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Nature

196 questions

Connect with nature through science! Test your knowledge of biology, ecosystems, animal behavior, plant life, natural phenomena, environmental science, and the wonders of the natural world.

Easy(50)Medium(80)Hard(66)

Easy Questions

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Question 1easy

71% of the Earth's surface is made up of

A.Continents

B.Deserts

C.Forests

D.Water

Reveal Answer

The correct answer is:

D. Water

Question 2easy

What is the hottest planet in the Solar System?

A.Jupiter

B.Mars

C.Mercury

D.Venus

Reveal Answer

The correct answer is:

D. Venus

Question 3easy

What is the standard atomic weight of a Plutonium nucleus?

A.128

B.244

C.481

D.94

Reveal Answer

The correct answer is:

B. 244

Question 4easy

How many bones are in the human body?

A.200

B.203

C.206

D.209

Reveal Answer

The correct answer is:

C. 206

Question 5easy

What is the largest animal currently on Earth?

A.Blue Whale

B.Colossal Squid

C.Giraffe

D.Orca

Reveal Answer

The correct answer is:

A. Blue Whale

Question 6easy

Which gas forms about 78% of the Earth’s atmosphere?

A.Argon

B.Carbon Dioxide

C.Nitrogen

D.Oxygen

Reveal Answer

The correct answer is:

C. Nitrogen

Question 7easy

What does the letter 'S' stand for in 'NASA'?

A.Science

B.Society

C.Space

D.Star

Reveal Answer

The correct answer is:

C. Space

Question 8easy

How many chromosomes are in your body cells?

A.21

B.22

C.23

D.24

Reveal Answer

The correct answer is:

C. 23

Question 9easy

How many planets are in our Solar System?

A.Eight

B.Nine

C.Seven

D.Ten

Reveal Answer

The correct answer is:

A. Eight

Question 10easy

The medical term for the belly button is which of the following?

A.Nares

B.Nevus

C.Paxillus

D.Umbilicus

Reveal Answer

The correct answer is:

D. Umbilicus

Question 11easy

What is the powerhouse of the cell?

A.Mitochondria

B.Nucleus

C.Redbull

D.Ribosome

Reveal Answer

The correct answer is:

A. Mitochondria

Question 12easy

What is the elemental symbol for mercury?

A.Hg

B.Hy

C.Mc

D.Me

Reveal Answer

The correct answer is:

A. Hg

Question 13easy

What is the chemical makeup of water?

A.C12H6O2

B.CO2

C.H

D.H20

Reveal Answer

The correct answer is:

D. H20

Question 14easy

What is the primary addictive substance found in tobacco?

A.Cathinone

B.Ephedrine

C.Glaucine

D.Nicotine

Reveal Answer

The correct answer is:

D. Nicotine

Question 15easy

Which of the following blood vessels carries deoxygenated blood?

A.Aorta

B.Coronary Artery

C.Pulmonary Artery

D.Pulmonary Vein

Reveal Answer

The correct answer is:

C. Pulmonary Artery

Question 16easy

What was the name of the first artificial Earth satellite, launched by the Soviet Union in 1957?

A.Soyuz 7K-OK

B.Sputnik 1

C.Voskhod 3KV

D.Zenit-2

Reveal Answer

The correct answer is:

B. Sputnik 1

Question 17easy

What does DNA stand for?

A.Deoxyribogenetic Acid

B.Deoxyribogenetic Atoms

C.Deoxyribonucleic Acid

D.Detoxic Acid

Reveal Answer

The correct answer is:

C. Deoxyribonucleic Acid

Question 18easy

Dry ice is the solid form of what substance?

A.Ammonia

B.Carbon dioxide

C.Nitrogen

D.Oxygen

Reveal Answer

The correct answer is:

B. Carbon dioxide

Question 19easy

Who discovered the Law of Gravity?

A.Albert Einstein

B.Charles Darwin

C.Galileo Galilei

D.Sir Isaac Newton

Reveal Answer

The correct answer is:

D. Sir Isaac Newton

Question 20easy

Which element has the chemical symbol 'Fe'?

A.Gold

B.Iron

C.Silver

D.Tin

Reveal Answer

The correct answer is:

B. Iron

Question 21easy

Which of these Elements is a metalloid?

A.Antimony

B.Bromine

C.Rubidium

D.Tin

Reveal Answer

The correct answer is:

A. Antimony

Question 22easy

What is the official name of the star located closest to the North Celestial Pole?

A.Eridanus

B.Gamma Cephei

C.Iota Cephei

D.Polaris

Reveal Answer

The correct answer is:

D. Polaris

Question 23easy

What is the speed of light in a vacuum?

A.299,792,458 m/s

B.308,215,043 m/s

C.50,461 m/s

D.751,665,014,151 m/s

Reveal Answer

The correct answer is:

A. 299,792,458 m/s

Question 24easy

Which is the longest bone in the human body?

A.Femur

B.Fibula

C.Scapula

D.Ulna

Reveal Answer

The correct answer is:

A. Femur

Question 25easy

What is the standard SI unit for temperature?

A.Celsius

B.Fahrenheit

C.Kelvin

D.Rankine

Reveal Answer

The correct answer is:

C. Kelvin

Question 26easy

What lies at the center of our galaxy?

A.A black hole

B.A quasar

C.A supernova

D.A wormhole

Reveal Answer

The correct answer is:

A. A black hole

Question 27easy

This element, when overcome with extreme heat and pressure, creates diamonds.

A.Carbon

B.Hydrogen

C.Nitrogen

D.Oxygen

Reveal Answer

The correct answer is:

A. Carbon

Question 28easy

Which type of rock is created by intense heat AND pressure?

A.Diamond

B.Igneous

C.Metamorphic

D.Sedimentary

Reveal Answer

The correct answer is:

C. Metamorphic

Question 29easy

What animal takes part in Schrödinger's most famous thought experiment?

A.Bat

B.Butterfly

C.Cat

D.Dog

Reveal Answer

The correct answer is:

C. Cat

Question 30easy

Which of these bones is hardest to break?

A.Cranium

B.Femur

C.Humerus

D.Tibia

Reveal Answer

The correct answer is:

B. Femur

Question 31easy

Which element has the highest melting point?

A.Carbon

B.Osmium

C.Platinum

D.Tungsten

Reveal Answer

The correct answer is:

A. Carbon

Question 32easy

What is the first element on the periodic table?

A.Helium

B.Hydrogen

C.Lithium

D.Oxygen

Reveal Answer

The correct answer is:

B. Hydrogen

Question 33easy

Who is the chemical element Curium named after?

A.Curious George

B.Marie & Pierre Curie

C.Stephen Curry

D.The Curiosity Rover

Reveal Answer

The correct answer is:

B. Marie & Pierre Curie

Question 34easy

What is the "powerhouse" of the Eukaryotic animal cell?

A.Chloroplast

B.Endoplasmic Reticulum

C.Mitochondria

D.Nucleus

Reveal Answer

The correct answer is:

C. Mitochondria

Question 35easy

What name is given to all baby marsupials?

A.Calf

B.Cub

C.Joey

D.Pup

Reveal Answer

The correct answer is:

C. Joey

Question 36easy

What is the atomic mass of Carbon?

A.10

B.12

C.14

D.16

Reveal Answer

The correct answer is:

B. 12

Question 37easy

The human heart has how many chambers?

A.2

B.3

C.4

D.6

Reveal Answer

The correct answer is:

C. 4

Question 38easy

Human cells typically have how many copies of each gene?

A.1

B.2

C.3

D.4

Reveal Answer

The correct answer is:

B. 2

Question 39easy

The biggest distinction between a eukaryotic cell and a prokaryotic cell is:

A.The mode of reproduction

B.The overall size

C.The presence or absence of a nucleus

D.The presence or absence of certain organelles

Reveal Answer

The correct answer is:

C. The presence or absence of a nucleus

Question 40easy

Which noble gas has the lowest atomic number?

A.Argon

B.Helium

C.Krypton

D.Neon

Reveal Answer

The correct answer is:

B. Helium

Question 41easy

Alzheimer's disease primarily affects which part of the human body?

A.Brain

B.Heart

C.Lungs

D.Skin

Reveal Answer

The correct answer is:

A. Brain

Question 42easy

How many planets make up our Solar System?

A.6

B.7

C.8

D.9

Reveal Answer

The correct answer is:

C. 8

Question 43easy

Which is the most abundant element in the universe?

A.Helium

B.Hydrogen

C.Lithium

D.Oxygen

Reveal Answer

The correct answer is:

B. Hydrogen

Question 44easy

Which Apollo mission was the first one to land on the Moon?

A.Apollo 10

B.Apollo 11

C.Apollo 13

D.Apollo 9

Reveal Answer

The correct answer is:

B. Apollo 11

Question 45easy

Which of the following bones is not in the leg?

A.Fibula

B.Patella

C.Radius

D.Tibia

Reveal Answer

The correct answer is:

C. Radius

Question 46easy

Rhinoplasty is a surgical procedure on what part of the human body?

A.Chin

B.Ears

C.Neck

D.Nose

Reveal Answer

The correct answer is:

D. Nose

Question 47easy

The asteroid belt is located between which two planets?

A.Earth and Mars

B.Jupiter and Saturn

C.Mars and Jupiter

D.Mercury and Venus

Reveal Answer

The correct answer is:

C. Mars and Jupiter

Question 48easy

What is the unit of electrical resistance?

A.Joule

B.Mho

C.Ohm

D.Tesla

Reveal Answer

The correct answer is:

C. Ohm

Question 49easy

What does LASER stand for?

A.Life antimatter by standing entry of range

B.Light amplification by stimulated emission of radiation

C.Light amplifier by standby energy of radio

D.Lite analysing by stereo ecorazer

Reveal Answer

The correct answer is:

B. Light amplification by stimulated emission of radiation

Question 50easy

The element involved in making human blood red is which of the following?

A.Cobalt

B.Copper

C.Iridium

D.Iron

Reveal Answer

The correct answer is:

D. Iron

Medium Questions

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Question 1medium

What is the scientific term for 'taste'?

A.Auditory Perception

B.Gustatory Perception

C.Olfaction

D.Somatosensation

Reveal Answer

The correct answer is:

B. Gustatory Perception

Question 2medium

Who made the discovery of X-rays?

A.Albert Einstein

B.James Watt

C.Thomas Alva Edison

D.Wilhelm Conrad Röntgen

Reveal Answer

The correct answer is:

D. Wilhelm Conrad Röntgen

Question 3medium

Where did the Great Storm of 1987 make landfall at, first?

A.Cornwall

B.Surrey

C.The Midlands

D.Wales

Reveal Answer

The correct answer is:

A. Cornwall

Question 4medium

To the nearest minute, how long does it take for light to travel from the Sun to the Earth?

A.12 Minutes

B.2 Minutes

C.6 Minutes

D.8 Minutes

Reveal Answer

The correct answer is:

D. 8 Minutes

Question 5medium

Which portion of the Marijuana plant produces the psychoactive substance known as THC?

A.Female Flower

B.Leaves

C.Male Flower

D.Root Ball

Reveal Answer

The correct answer is:

A. Female Flower

Question 6medium

Down Syndrome is usually caused by an extra copy of which chromosome?

A.15

B.21

C.23

D.24

Reveal Answer

The correct answer is:

B. 21

Question 7medium

What stage of development do the majority of eukaryotic cells remain in for most of their life?

A.Interphase

B.Prophase

C.Stasis

D.Telophase

Reveal Answer

The correct answer is:

A. Interphase

Question 8medium

What is the colour of unoxidized blood?

A.Blue

B.Green

C.Purple

D.Red

Reveal Answer

The correct answer is:

D. Red

Question 9medium

Which chemical element has the lowest boiling point?

A.Helium

B.Hydrogen

C.Neon

D.Nitrogen

Reveal Answer

The correct answer is:

A. Helium

Question 10medium

What is an alternative name for multiple personality disorder?

A.Body integrity identity disorder

B.Dissociative identity disorder

C.Identity crisis

D.Schizophrenia

Reveal Answer

The correct answer is:

B. Dissociative identity disorder

Question 11medium

Which chemical element was originally known as Alabamine?

A.Antimony

B.Astatine

C.Molybdenum

D.Selenium

Reveal Answer

The correct answer is:

B. Astatine

Question 12medium

An organism described as "heliotropic" has a tendancy to move towards which of these things?

A.Light

B.Pollen

C.Trees

D.Water

Reveal Answer

The correct answer is:

A. Light

Question 13medium

Which part of the body does glaucoma affect?

A.Blood

B.Eyes

C.Stomach

D.Throat

Reveal Answer

The correct answer is:

B. Eyes

Question 14medium

What mineral has the lowest number on the Mohs scale?

A.Diamond

B.Gypsum

C.Quartz

D.Talc

Reveal Answer

The correct answer is:

D. Talc

Question 15medium

Which of the following is NOT a passive electrical component?

A.Capacitor

B.Inductor

C.Resistor

D.Transistor

Reveal Answer

The correct answer is:

D. Transistor

Question 16medium

The medial meniscus forms which part of what joint in the human body?

A.Ankle

B.Elbow

C.Knee

D.Shoulder

Reveal Answer

The correct answer is:

C. Knee

Question 17medium

Deuterium is an isotope of which element?

A.Helium

B.Hydrogen

C.Neon

D.Nitrogen

Reveal Answer

The correct answer is:

B. Hydrogen

Question 18medium

What is the half-life of Uranium-235?

A.1,260,900,000 years

B.4,300,400,000 years

C.703,800,000 years

D.Uranium-235 is a stable isotope

Reveal Answer

The correct answer is:

C. 703,800,000 years

Question 19medium

Who developed the first successful polio vaccine in the 1950s?

A.Frederick Robbins

B.John F. Enders

C.Jonas Salk

D.Thomas Weller

Reveal Answer

The correct answer is:

C. Jonas Salk

Question 20medium

Au on the Periodic Table refers to which element?

A.Gold

B.Nickel

C.Oxygen

D.Silver

Reveal Answer

The correct answer is:

A. Gold

Question 21medium

The humerus, paired radius, and ulna come together to form what joint?

A.Ankle

B.Elbow

C.Knee

D.Sholder

Reveal Answer

The correct answer is:

B. Elbow

Question 22medium

What is Hypernatremia?

A.Decrease in blood iron

B.Decrease in blood potassium

C.Increase in blood glucose

D.Increase in blood sodium

Reveal Answer

The correct answer is:

D. Increase in blood sodium

Question 23medium

What is the unit of electrical capacitance?

A.Farad

B.Gauss

C.Henry

D.Watt

Reveal Answer

The correct answer is:

A. Farad

Question 24medium

When was the first mammal successfully cloned?

A.1985

B.1996

C.1999

D.2009

Reveal Answer

The correct answer is:

B. 1996

Question 25medium

What are human nails made of?

A.Bone

B.Calcium

C.Chitin

D.Keratin

Reveal Answer

The correct answer is:

D. Keratin

Question 26medium

What do you study if you are studying entomology?

A.Fish

B.Humans

C.Insects

D.the Brain

Reveal Answer

The correct answer is:

C. Insects

Question 27medium

On which mission did the Space Shuttle Columbia break up upon re-entry?

A.STS-107

B.STS-109

C.STS-51-L

D.STS-61-C

Reveal Answer

The correct answer is:

A. STS-107

Question 28medium

Which planet did the "Viking 1" spacecraft send surface images of, starting in 1976?

A.Jupiter

B.Mars

C.Saturn

D.Venus

Reveal Answer

The correct answer is:

B. Mars

Question 29medium

How many officially recognized dwarf planets in the solar system are named after Polynesian deities?

A.0

B.1

C.2

D.5

Reveal Answer

The correct answer is:

C. 2

Question 30medium

What is the largest living organism currently known to man?

A.Blue Whale

B.Honey Fungus

C.Redwood Tree

D.The Coral Reef

Reveal Answer

The correct answer is:

B. Honey Fungus

Question 31medium

In human biology, a circadium rhythm relates to a period of roughly how many hours?

A.16

B.24

C.32

D.8

Reveal Answer

The correct answer is:

B. 24

Question 32medium

What was the first living creature in space?

A.Dog

B.Fruit Flies

C.Monkey

D.Mouse

Reveal Answer

The correct answer is:

B. Fruit Flies

Question 33medium

What are the smallest blood vessels in the human body?

A.Arterioles

B.Capillaries

C.Lymphatics

D.Veinules

Reveal Answer

The correct answer is:

B. Capillaries

Question 34medium

What polymer is used to make CDs, safety goggles and riot shields?

A.Bakelite

B.Nylon

C.Polycarbonate

D.Rubber

Reveal Answer

The correct answer is:

C. Polycarbonate

Question 35medium

How many degrees Fahrenheit is 100 degrees Celsius?

A.100

B.212

C.326

D.451

Reveal Answer

The correct answer is:

B. 212

Question 36medium

The human right lung has how many lobes?

A.1

B.2

C.3

D.4

Reveal Answer

The correct answer is:

C. 3

Question 37medium

What term is best associated with Sigmund Freud?

A.Cognitive-Behavioral Therapy

B.Dialectical Behavior Therapy

C.Psychoanalysis

D.Theory of Gravity

Reveal Answer

The correct answer is:

C. Psychoanalysis

Question 38medium

What part of the brain takes its name from the Greek for seahorse?

A.Amygdala

B.Cerebellum

C.Hippocampus

D.Thalamus

Reveal Answer

The correct answer is:

C. Hippocampus

Question 39medium

Gannymede is the largest moon of which planet?

A.Jupiter

B.Mars

C.Neptune

D.Uranus

Reveal Answer

The correct answer is:

A. Jupiter

Question 40medium

The Sun consists of mostly which two elements?

A.Carbon & Helium

B.Carbon & Nitrogen

C.Hydrogen & Helium

D.Hydrogen & Nitrogen

Reveal Answer

The correct answer is:

C. Hydrogen & Helium

Question 41medium

What is the molecular formula of the active component of chili peppers(Capsaicin)?

A.C13H25NO4

B.C18H27NO3

C.C21H23NO3

D.C6H4Cl2

Reveal Answer

The correct answer is:

B. C18H27NO3

Question 42medium

At what temperature does water boil?

A.178°F

B.181°F

C.200°F

D.212°F

Reveal Answer

The correct answer is:

D. 212°F

Question 43medium

What is the study of the cells and tissues of plants and animals?

A.Anatomy

B.Biochemistry

C.Histology

D.Microbiology

Reveal Answer

The correct answer is:

C. Histology

Question 44medium

How old is the universe?

A.13.8 Billion Years

B.16.2 Billion Years

C.4.5 Billion Years

D.7.9 Billion Years

Reveal Answer

The correct answer is:

A. 13.8 Billion Years

Question 45medium

Myopia is the scientific term for which condition?

A.Clouded Vision

B.Double Vision

C.Farsightedness

D.Shortsightedness

Reveal Answer

The correct answer is:

D. Shortsightedness

Question 46medium

About how old is Earth?

A.2.5 Billion Years

B.3.5 Billion Years

C.4.5 Billion Years

D.5.5 Billion Years

Reveal Answer

The correct answer is:

C. 4.5 Billion Years

Question 47medium

What is the atomic number of the element Strontium?

A.11

B.38

C.47

D.73

Reveal Answer

The correct answer is:

B. 38

Question 48medium

The medical condition osteoporosis affects which part of the body?

A.Bones

B.Brain

C.Heart

D.Skin

Reveal Answer

The correct answer is:

A. Bones

Question 49medium

Which color cannot be produced in Roses, even through genetic alteration?

A.Black

B.Blue

C.Brown

D.Orange

Reveal Answer

The correct answer is:

B. Blue

Question 50medium

The moons, Miranda, Ariel, Umbriel, Titania and Oberon orbit which planet?

A.Jupiter

B.Neptune

C.Uranus

D.Venus

Reveal Answer

The correct answer is:

C. Uranus

Question 51medium

In aeronautics, flaps and slats are used to control what on an aircraft?

A.Drag

B.Lift

C.Thrust

D.Weight

Reveal Answer

The correct answer is:

B. Lift

Question 52medium

Which of these elements on the Periodic Table is a Noble Gas?

A.Colbalt

B.Iodine

C.Neon

D.Potassium

Reveal Answer

The correct answer is:

C. Neon

Question 53medium

Along with Oxygen, which element is primarily responsible for the sky appearing blue?

A.Carbon

B.Helium

C.Hydrogen

D.Nitrogen

Reveal Answer

The correct answer is:

D. Nitrogen

Question 54medium

Which of these stars is the largest?

A.Betelgeuse

B.RW Cephei

C.UY Scuti

D.VY Canis Majoris

Reveal Answer

The correct answer is:

C. UY Scuti

Question 55medium

Which psychological term refers to the stress of holding contrasting beliefs?

A.Blind Sight

B.Cognitive Dissonance

C.Flip-Flop Syndrome

D.Split-Brain

Reveal Answer

The correct answer is:

B. Cognitive Dissonance

Question 56medium

Approximately how long is a year on Uranus?

A.109 Earth years

B.47 Earth years

C.62 Earth years

D.84 Earth years

Reveal Answer

The correct answer is:

D. 84 Earth years

Question 57medium

All the following metal elements are liquids at or near room temperature EXCEPT:

A.Beryllium

B.Caesium

C.Gallium

D.Mercury

Reveal Answer

The correct answer is:

A. Beryllium

Question 58medium

In Chemistry, how many isomers does Butanol (C4H9OH) have?

A.3

B.4

C.5

D.6

Reveal Answer

The correct answer is:

B. 4

Question 59medium

What is the name of the cognitive bias wherein a person with low ability in a particular skill mistake themselves as being superior?

A.Dunning-Kruger effect

B.Freud-Hall effect

C.Meyers-Briggs effect

D.Müller-Lyer effect

Reveal Answer

The correct answer is:

A. Dunning-Kruger effect

Question 60medium

Which desert is the only desert in the world where the "Saguaro" cactus grows indigenously?

A.The Arabian Desert

B.The Gobi Desert

C.The Sonoran Desert

D.The Yuma Desert

Reveal Answer

The correct answer is:

C. The Sonoran Desert

Question 61medium

What is the chemical formula for ammonia?

A.CH4

B.CO2

C.NH3

D.NO3

Reveal Answer

The correct answer is:

C. NH3

Question 62medium

Which of the following spacecraft never touched the moon?

A.Apollo 11

B.Luna 2

C.Mariner 4

D.SMART-1

Reveal Answer

The correct answer is:

C. Mariner 4

Question 63medium

What is radiation measured in?

A.Decibel

B.Gray

C.Kelvin

D.Watt

Reveal Answer

The correct answer is:

B. Gray

Question 64medium

Which of the following men does not have a chemical element named after him?

A.Albert Einstein

B.Enrico Fermi

C.Niels Bohr

D.Sir Isaac Newton

Reveal Answer

The correct answer is:

D. Sir Isaac Newton

Question 65medium

What is the Linnean name of the domestic apple tree?

A.Appelus delectica

B.Malus americana

C.Malus pumila

D.Pomus domestica

Reveal Answer

The correct answer is:

C. Malus pumila

Question 66medium

Where did the dog breed "Chihuahua" originate?

A.France

B.Mexico

C.Russia

D.Spain

Reveal Answer

The correct answer is:

B. Mexico

Question 67medium

Which of these choices is not one of the phases of mitosis?

A.Anaphase

B.Diplophase

C.Metaphase

D.Telophase

Reveal Answer

The correct answer is:

B. Diplophase

Question 68medium

After which Danish city is the 72th element on the periodic table named?

A.Copenhagen

B.Herning

C.Odense

D.Skagen

Reveal Answer

The correct answer is:

A. Copenhagen

Question 69medium

A positron is an antiparticle of a what?

A.Electron

B.Neutron

C.Photon

D.Proton

Reveal Answer

The correct answer is:

A. Electron

Question 70medium

The "Tibia" is found in which part of the body?

A.Arm

B.Hand

C.Head

D.Leg

Reveal Answer

The correct answer is:

D. Leg

Question 71medium

On the periodic table of elements, what is the symbol for Tin?

A.Na

B.Ni

C.Sn

D.Ti

Reveal Answer

The correct answer is:

C. Sn

Question 72medium

Which of these is a type of stretch/deep tendon reflex?

A.Ankle jerk reflex

B.Gag reflex

C.Pupillary light reflex

D.Scratch reflex

Reveal Answer

The correct answer is:

A. Ankle jerk reflex

Question 73medium

Which element has the atomic number of 7?

A.Hydrogen

B.Neon

C.Nitrogen

D.Oxygen

Reveal Answer

The correct answer is:

C. Nitrogen

Question 74medium

Which of these is NOT a part of the structure of a typical neuron?

A.Islets of Langerhans

B.Myelin sheath

C.Node of Ranvier

D.Schwann cell

Reveal Answer

The correct answer is:

A. Islets of Langerhans

Question 75medium

The Axiom of Preventive Medicine states that people with _ risk for a disease should be screened and we should treat _ of those people.

A.high, all

B.high, some

C.low, all

D.low, some

Reveal Answer

The correct answer is:

C. low, all

Question 76medium

In Psychology, which need appears highest in the "Maslow's hierarchy of needs" pyramid?

A.Esteem

B.Love

C.Physiological

D.Safety

Reveal Answer

The correct answer is:

A. Esteem

Question 77medium

Which one of these scientists conducted the Gold Foil Experiment which concluded that atoms are mostly made of empty space?

A.Archimedes

B.Ernest Rutherford

C.Joseph John Thomson

D.Niels Henrik David Bohr

Reveal Answer

The correct answer is:

B. Ernest Rutherford

Question 78medium

Deionized water is water with which of the following removed?

A.Hydrogen

B.Iron

C.Oxygen

D.Uncharged atoms

Reveal Answer

The correct answer is:

B. Iron

Question 79medium

What does the yellow diamond on the NFPA 704 fire diamond represent?

A.Flammability

B.Health

C.Radioactivity

D.Reactivity

Reveal Answer

The correct answer is:

D. Reactivity

Question 80medium

When the Falcon Heavy was launched on it's test flight, what was the only part of the operation that failed?

A.Center Core Landing

B.Deployment of Starman

C.Ignition and Liftoff

D.Side Booster Landing

Reveal Answer

The correct answer is:

A. Center Core Landing

Hard Questions

View all hard questions →

Question 1hard

Which of the following liquids is least viscous? Assume temperature is 25°C.

A.Acetone

B.Benzene

C.Mercury

D.Water

Reveal Answer

The correct answer is:

A. Acetone

Question 2hard

What is isobutylphenylpropanoic acid more commonly known as?

A.Aspirin

B.Ibuprofen

C.Ketamine

D.Morphine

Reveal Answer

The correct answer is:

B. Ibuprofen

Question 3hard

What causes the sound of a heartbeat?

A.Blood exiting the heart

B.Closure of the heart valves

C.Contraction of the heart chambers

D.Relaxation of the heart chambers

Reveal Answer

The correct answer is:

B. Closure of the heart valves

Question 4hard

Which of the following plastic is commonly used for window frames, gutters and drain pipes?

A.Polyethylene (PE)

B.Polypropylene (PP)

C.Polystyrene (PS)

D.Polyvinylchloride (PVC)

Reveal Answer

The correct answer is:

D. Polyvinylchloride (PVC)

Question 5hard

Which horizon in a soil profile consists of bedrock?

A.B

B.D

C.O

D.R

Reveal Answer

The correct answer is:

D. R

Question 6hard

The word "science" stems from the word "scire" meaning what?

A.To count

B.To know

C.To live

D.To measure

Reveal Answer

The correct answer is:

B. To know

Question 7hard

Which of these chemical compounds is NOT found in gastric acid?

A.Hydrochloric acid

B.Potassium chloride

C.Sodium chloride

D.Sulfuric acid

Reveal Answer

The correct answer is:

D. Sulfuric acid

Question 8hard

What is the molecular formula of Glucose?

A.C2H4O2

B.C6H12O6

C.CH4

D.K+

Reveal Answer

The correct answer is:

B. C6H12O6

Question 9hard

An organic compound is considered an alcohol if it has what functional group?

A.Aldehyde

B.Alkyl

C.Carbonyl

D.Hydroxyl

Reveal Answer

The correct answer is:

D. Hydroxyl

Question 10hard

Which of the following is considered classical conditioning?

A.Harlow’s monkey experiments

B.Pavlov's dog experiments

C.Schrödinger's cat experiment

D.Skinner box experiment

Reveal Answer

The correct answer is:

B. Pavlov's dog experiments

Question 11hard

How many objects are equivalent to one mole?

A.6.002 x 10^22

B.6.002 x 10^23

C.6.022 x 10^22

D.6.022 x 10^23

Reveal Answer

The correct answer is:

D. 6.022 x 10^23

Question 12hard

Which of the following elements is typically used in the doping of the semiconductor silicon?

A.Boron

B.Carbon

C.Iron

D.Oxygen

Reveal Answer

The correct answer is:

A. Boron

Question 13hard

Which is not a type of neuron?

A.Interneuron

B.Motor Neuron

C.Perceptual Neuron

D.Sensory Neuron

Reveal Answer

The correct answer is:

C. Perceptual Neuron

Question 14hard

What is the molecular formula of Ozone?

A.C6H2O6

B.N2O

C.O3

D.SO4

Reveal Answer

The correct answer is:

C. O3

Question 15hard

Which of the following are cells of the adaptive immune system?

A.Cytotoxic T cells

B.Dendritic cells

C.Natural killer cells

D.White blood cells

Reveal Answer

The correct answer is:

A. Cytotoxic T cells

Question 16hard

Autosomal-dominant Compelling Helio-Ophthalmic Outburst syndrome is the need to do what when seeing the Sun?

A.Cough

B.Hiccup

C.Sneeze

D.Yawn

Reveal Answer

The correct answer is:

C. Sneeze

Question 17hard

In quantum physics, which of these theorised sub-atomic particles has yet to be observed?

A.Gluon

B.Graviton

C.Tau neutrino

D.Z boson

Reveal Answer

The correct answer is:

B. Graviton

Question 18hard

All of the following human genetic haplogroup names are shared between Y-chromosome and mitochondrial DNA haplogroups EXCEPT:

A.Haplogroup J

B.Haplogroup L

C.Haplogroup T

D.Haplogroup U

Reveal Answer

The correct answer is:

D. Haplogroup U

Question 19hard

The Western Lowland Gorilla is scientifically know as?

A.Gorilla Beringei Beringei

B.Gorilla Beringei Graueri

C.Gorilla Gorilla Diehli

D.Gorilla Gorilla Gorilla

Reveal Answer

The correct answer is:

D. Gorilla Gorilla Gorilla

Question 20hard

If you planted the seeds of Quercus robur what would grow?

A.Flowers

B.Grains

C.Trees

D.Vegtables

Reveal Answer

The correct answer is:

C. Trees

Question 21hard

Which of these is a stop codon in DNA?

A.ACA

B.ACT

C.GTA

D.TAA

Reveal Answer

The correct answer is:

D. TAA

Question 22hard

What physics principle relates the net electric flux out of a closed surface to the charge enclosed by that surface?

A.Ampere's Law

B.Biot-Savart Law

C.Faraday's Law

D.Gauss's Law

Reveal Answer

The correct answer is:

D. Gauss's Law

Question 23hard

What is the name for the auditory illusion of a note that seems to be rising infinitely?

A.Fransen Effect

B.Glissandro Illusion

C.McGurck Effect

D.Shepard Tone

Reveal Answer

The correct answer is:

D. Shepard Tone

Question 24hard

What is the same in Celsius and Fahrenheit?

A.-39

B.-40

C.-42

D.32

Reveal Answer

The correct answer is:

B. -40

Question 25hard

How many protons are in an oxygen atom?

A.Eight

B.Four

C.Six

D.Two

Reveal Answer

The correct answer is:

A. Eight

Question 26hard

Muscle fiber is constructed of bundles small long organelles called what?

A.Epimysium

B.Myocardium

C.Myofiaments

D.Myofibrils

Reveal Answer

The correct answer is:

D. Myofibrils

Question 27hard

Which of the following is a major muscle of the back?

A.Trapezium

B.Trapezius

C.Trapezoid

D.Triquetrum

Reveal Answer

The correct answer is:

B. Trapezius

Question 28hard

What is the scientific name of the knee cap?

A.Femur

B.Foramen Magnum

C.Patella

D.Scapula

Reveal Answer

The correct answer is:

C. Patella

Question 29hard

What was the first organic compound to be synthesized from inorganic compounds?

A.Ethanol

B.Formaldehyde

C.Propane

D.Urea

Reveal Answer

The correct answer is:

D. Urea

Question 30hard

In physics, conservation of energy and conservation of momentum are both consequences of which of the following?

A.Bell's Theorem

B.Carnot's Theorem

C.Noether's Theorem

D.Wick's Theorem

Reveal Answer

The correct answer is:

C. Noether's Theorem

Question 31hard

Folic acid is the synthetic form of which vitamin?

A.Vitamin A

B.Vitamin B

C.Vitamin C

D.Vitamin D

Reveal Answer

The correct answer is:

B. Vitamin B

Question 32hard

Which of the following is NOT a real element?

A.Hassium

B.Lutetium

C.Praseodymium

D.Vitrainium

Reveal Answer

The correct answer is:

D. Vitrainium

Question 33hard

Which is the chemical name of H2O?

A.Ammonium chloride

B.Anhydrous Sodium Carbonate

C.Dihydrogen Monoxide

D.Manganese dioxide

Reveal Answer

The correct answer is:

C. Dihydrogen Monoxide

Question 34hard

What common name is given to the medial condition, tibial stress syndrome (MTSS)?

A.Carpal Tunnel

B.Housemaid's Knee

C.Shin Splints

D.Tennis Elbow

Reveal Answer

The correct answer is:

C. Shin Splints

Question 35hard

What element on the periodic table has 92 electrons?

A.Hydrogen

B.Iron

C.Sulfur

D.Uranium

Reveal Answer

The correct answer is:

D. Uranium

Question 36hard

Where is the Gluteus Maximus muscle located?

A.Arm

B.Butt

C.Head

D.Torso

Reveal Answer

The correct answer is:

B. Butt

Question 37hard

The 'Islets of Langerhans' is found in which human organ?

A.Brain

B.Kidney

C.Liver

D.Pancreas

Reveal Answer

The correct answer is:

D. Pancreas

Question 38hard

What is "Stenoma"?

A.A combat stimulant from WW2

B.A genus of moths

C.A port city in the carribean

D.A type of seasoning

Reveal Answer

The correct answer is:

B. A genus of moths

Question 39hard

What nucleotide pairs with guanine?

A.Adenine

B.Cytosine

C.Thymine

D.Uracil

Reveal Answer

The correct answer is:

B. Cytosine

Question 40hard

Which scientific unit is named after an Italian nobleman?

A.Hertz

B.Ohm

C.Pascal

D.Volt

Reveal Answer

The correct answer is:

D. Volt

Question 41hard

What is the unit of electrical inductance?

A.Coulomb

B.Henry

C.Mho

D.Weber

Reveal Answer

The correct answer is:

B. Henry

Question 42hard

In the Scoville scale, what is the hottest chemical?

A.Capsaicin

B.Dihydrocapsaicin

C.Resiniferatoxin

D.Tinyatoxin

Reveal Answer

The correct answer is:

C. Resiniferatoxin

Question 43hard

How many legs is it biologically impossible for a centipede to have?

A.100

B.26

C.50

D.74

Reveal Answer

The correct answer is:

A. 100

Question 44hard

On the Beaufort Scale of wind force, what wind name is given to number 8?

A.Breeze

B.Gale

C.Hurricane

D.Storm

Reveal Answer

The correct answer is:

B. Gale

Question 45hard

Which of the following is NOT a word used to describe an earthquake?

A.Drop-slide

B.Foreshock

C.Strike-slip

D.Temblor

Reveal Answer

The correct answer is:

A. Drop-slide

Question 46hard

What is the scientific name of the red fox?

A.Red Fox

B.Vulpes Redus

C.Vulpes Vulpes

D.Vulpes Vulpie

Reveal Answer

The correct answer is:

C. Vulpes Vulpes

Question 47hard

Burning which of these metals will produce a bright white flame?

A.Copper

B.Lead

C.Lithium

D.Magnesium

Reveal Answer

The correct answer is:

D. Magnesium

Question 48hard

Which constellation contains the center of the Milky Way?

A.Capricornus

B.Ophiuchus

C.Sagittarius

D.Scorpius

Reveal Answer

The correct answer is:

C. Sagittarius

Question 49hard

What does the term "isolation" refer to in microbiology?

A.A lack of nutrition in microenviroments

B.Testing effects of certain microorganisms in an isolated enviroments, such as caves

C.The nitrogen level in soil

D.The separation of a strain from a natural, mixed population of living microbes

Reveal Answer

The correct answer is:

D. The separation of a strain from a natural, mixed population of living microbes

Question 50hard

What is the scientific name for the extinct hominin known as "Lucy"?

A.Australopithecus Afarensis

B.Australopithecus Africanus

C.Australopithecus Antaris

D.Australopithecus Architeuthis

Reveal Answer

The correct answer is:

A. Australopithecus Afarensis

Question 51hard

Botanically speaking, which of these fruits is NOT a berry?

A.Banana

B.Blueberry

C.Concord Grape

D.Strawberry

Reveal Answer

The correct answer is:

D. Strawberry

Question 52hard

Which major extinction event was caused by an asteroid collision and eliminated the majority of non-avian dinosaurs?

A.Cretaceous-Paleogene

B.Ordovician–Silurian

C.Permian–Triassic

D.Triassic–Jurassic

Reveal Answer

The correct answer is:

A. Cretaceous-Paleogene

Question 53hard

"The Big Bang Theory" was first theorized by a priest of what religious ideology?

A.Catholic

B.Christian

C.Islamic

D.Jewish

Reveal Answer

The correct answer is:

A. Catholic

Question 54hard

Coulrophobia is the irrational fear of what?

A.Cemeteries

B.Clowns

C.Needles

D.Tunnels

Reveal Answer

The correct answer is:

B. Clowns

Question 55hard

A comet's gaseous envelope (which creates the tail) is called what?

A.The ablative

B.The backwash

C.The coma

D.The wake

Reveal Answer

The correct answer is:

C. The coma

Question 56hard

Which of the following is the term for "surgical complications resulting from surgical sponges left inside the patient's body?

A.Gongoozler

B.Gossypiboma

C.Jentacular

D.Meupareunia

Reveal Answer

The correct answer is:

B. Gossypiboma

Question 57hard

How much radiation does a banana emit?

A.0.1 Microsievert

B.0.3 Microsievert

C.0.5 Microsievert

D.0.7 Microsievert

Reveal Answer

The correct answer is:

A. 0.1 Microsievert

Question 58hard

Which of these animals belongs in class Chondrichthyes?

A.Catfish

B.Great white shark

C.Killer whale

D.Octopus

Reveal Answer

The correct answer is:

B. Great white shark

Question 59hard

Which one of these is scientific term for "Brain Freeze"?

A.Amaranthus Retroflexus

B.Amblyomma Americanum

C.Hyacinthoides Italica

D.Sphenopalatine Ganglioneuralgia

Reveal Answer

The correct answer is:

D. Sphenopalatine Ganglioneuralgia

Question 60hard

What genetic disease is caused by having an extra Y chromosome (XYY)?

A.Down Syndrome

B.Jacob's Syndrome

C.Klinefelter's Syndrome

D.Turner's Syndrome

Reveal Answer

The correct answer is:

B. Jacob's Syndrome

Question 61hard

Which moon is the only satellite in our solar system to possess a dense atmosphere?

A.Callisto

B.Europa

C.Miranda

D.Titan

Reveal Answer

The correct answer is:

D. Titan

Question 62hard

How long is a light-year?

A.1 AU

B.105.40 Earth-years

C.501.2 Million Miles

D.9.461 Trillion Kilometres

Reveal Answer

The correct answer is:

D. 9.461 Trillion Kilometres

Question 63hard

How many types of quarks are there in the standard model of physics?

A.2

B.3

C.4

D.6

Reveal Answer

The correct answer is:

D. 6

Question 64hard

What is considered the rarist form of color blindness?

A.Blue

B.Green

C.Purple

D.Red

Reveal Answer

The correct answer is:

A. Blue

Question 65hard

The core of the Sun can reach which temperature?

A.27° Million F (15° Million C)

B.8° Billion F (°4.4 Billion C)

C.938,000° F (521093.3° C)

D.Absolute Zero (Both F and C)

Reveal Answer

The correct answer is:

A. 27° Million F (15° Million C)

Question 66hard

What is the most potent toxin known?

A.Asbestos

B.Botulinum toxin

C.Cyanide

D.Ricin

Reveal Answer

The correct answer is:

B. Botulinum toxin