Science Trivia

Science Trivia Questions & Answers for the Classroom

Human Body questions and answers
1) True or false - there are 206 bones in an adult human body and 300 bones in an infants body?   True. Some bones in infants skulls have not yet fused together.
2) True or false- most of the dust in your home is made of human skin?   True - up to 70%!
3) Can you lick your elbow?   No. Now be honest, did you try?
4) If you go into space, do you get taller?   Yes, the cartilage disks in your spine expand under zero gravity.
5) What is the hardest substance in the human body?   Tooth enamel.
6) What is trepanning?   An ancient form of medicine which involved making holes in human skull to relieve   pressure; don't try at home!
7) In terms of attributed human deaths which are more dangerous; snakes, bees, sharks or house flies?   House flies. They are vectors for disease causing bacteria.
8) True or false; your body's temperature rises slightly during digestion?   True
9) Where are the three smallest bones in the human body? What are they called?   In the middle ear. Collectively called ossicles, the 3 bones are the Malleus (hammer), Incus (anvil) & Stapes (stirrup).
10) What's the lifespan of a human red blood cell?   Around 120 days.
11) True or false; A modern human's brain is smaller than a Neanderthal's brain?   True.
12) What is the longest type of cell in the body?   The nerve cell (neuron).
13) What does bile do in you body?   Emulsify fats in the small intestine
14) What is a Pyrogen?   A substance that causes fever.
15) Where would you find your pinna?   It's your outer ear (the bit you see made out of cartilage)
16) Who has more hair follicles, blondes or brunettes?   Blondes.
17) Which is the rarest blood type in humans?   AB negative. <1% of the population
18) Why does eyesight change as you get older?   The eye's lens continues to grow throughout life, becoming thicker and less transparent.
19) True or false; nitroglycerine can be used to treat heart attacks?   True. It dilates blood vessels.
20) Do have the same number of neck vertebrae as giraffe's?   Yes.
21) How much salt does the average human body contain?   Around 250 grams.
22) If I kept walking in a straight line on a flat surface with no visible features, is it possible to walk in circles eventually?   People often favor one leg over the other. It is possible that over time the discrepancy between the two leg strides may indeed cause you to walk in circles.
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Chemistry trivia questions and answers
1) True or false - sterling silver is pure silver?   False. It contains up to 7.5% copper
2) Which chemical causes the burning taste sensation when eating chilies?   Capcaicin
3) What temperature and pressure is needed to convert graphite into a diamond?   3000 degrees celsius and 100,000 atmospheres. That's 10132500 kPA, at least 20,000 times more pressure than the pressure inside the average bike tire!
4) What is a buret?   A long tube of glass usually marked in 0.1mL units that's equipped with a stopcock for the controlled addition of a liquid to a receiving flask
5) Which is the only metal that is liquid at room temperature?   Mercury (melting point of -38.87 deg Celsius). Room temperature is usually defined as 25 deg. Celsius. Gallium gets close to also melting at room temperature > it's melting temperature is 29.78 deg. Celsius... almost made it!
6) Who invented the first battery?   Count Alessandro Volta
7) Is a white gold ring pure gold?   White gold is usually an alloy of gold and a white metal such as silver and palladium. Nickel   is no longer used due to skin allergies.
8) What is 'fools gold'?   Iron pyrite crystals.
9) What is the symbol for Silver?   Ag
10) What does ATP stand for?   Adenosine triphosphate, the molecule that is used for energy by all cells
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Astronomy questions and answers
1) What survives impacting Earth's surface; a meteor, a meteorite or an asteroid?   Meteorite.
2) What is the strongest known magnet in the Universe?   A Neutron Star
3) Which is the hottest planet in the solar system?   Venus, surface temperature 460oC
4) How far is the moon away from Earth?   Around 376 600 km away.
5) How old is our Sun?   5 billion years... we think...
6) What is the name given to planets outside our solar system?   Extrasolar planets
7) Where is the largest known meteorite crater on Earth?   Vredefort Ring in South Africa, 299km diameter!
8) What causes an Aurora?   Charged particles from solar wind
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Geology & Geography questions and answers
1) Is Obsidian an igneous, sedimentary or metamorphic rock?   Igneous.
2) Which country has the longest coastline?   Canada, due to the number of northern islands.
3) What formation on Earth can have the names tabular, blocky, wedge, dome, pinnacle, dry dock, growler or bergy bit?   Icebergs
4) Which crystalline formations are on cave ceilings; stalagmites or stalactites?   Stalactites.
5) Is a Tsunami and a tidal wave the same thing?   No. Tsunamis are caused by water displacement as a result of an undersea earthquake or a landslide. Tidal waves are caused by the moon & Sun's gravitational pull combined with prevailing winds and water currents.
6) What is the definition of dust?   A particle small enough to be carried by air currents.
7) When was the first seismograph invented?   Approximately A.D. 200 in China
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Weather and our atmosphere questions & answers
1) What's the highest recorded surface wind speed?   372km/h! Over Mt Washington, New Hampshire on April 12, 1934.
2) What is the name of the layer of air closest to us in the atmosphere?   Troposphere
3) True or false - is lightning 3 times hotter than the Sun?   True
4) True or false; when lighting hits a tree the water inside the tree boils and expands, blowing the tree apart?   True
5) Is the stratosphere above or below the troposphere?    Extending 50km above the troposphere
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General physics and mathematics questions and answers
1) Where does sound travel faster; water or air?   Water.
2) What is opposite to matter?   Antimatter.
3) Why do bubbles pop?   They get too dry from the surrounding air. 
4) What is the Law of Conservation of Energy?   The energy of the Universe is constant; it can neither be created or destroyed but only transferred and transformed.
5) What does a manometer measure?   The pressure of a closed system.
6) What is the unit measurement for the activity of a radioactive source?   The Becqueral (Bq). 1 Bq = 1 disintegration per second 
7) If you mix all light colours, do you get black, white or a rainbow?   White. Technically adding all colours of light together is called colour addition. 
8) How many separate patents did Thomas Edison file?   1093!
9) Can you fold a piece of paper in half 7 times?   No, at least not using everyday paper. NB: We've had some feedback about this one. The   'Mythbusters' show did try this and get 8 folds, however this required a paper sheet the size of a football field and further folding required a steamroller!

  Check this link. Of course, this is a wikipedia stub and as such needs further verification on   it's statements. We've followed the stated instructions and only achieved a "7 fold" a couple   of times. For most cases it really isn't that possible.

  Thanks for the feedback!
10) What does TCP/IP stand for?   Transmission Control Protocol / Internet Protocol. 
11) When and where was the abacus invented?   At least 2000 years ago. It was invented in Mesopotamia, most likely by the Babylonians
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Biology questions and answers

1) What type of organism makes up the oldest known fossil?

  Blue-green algae from South Africa at 3.2 billion years old.

2) What does the Scoville Heat Unit Scale measure?

  The heat of chilies

3) Is a tomato a fruit or vegetable?o

  A fruit.

4) What is the collective name of animals and plants that live on a lake bottom?


5) What is the largest living structure on Earth?

  The Great Barrier Reef, Australia

6) What is oldest living thing known on Earth?

  A bristlecone pine in California... it's about 4600 years old!

7) What is the world's tallest grass?

  Bamboo. Some species reach up to 39 metres in height.

8) What Australian timber made the London docks?

  Turpentine; Syncarpia glomulifera

9) What is Xylem?

  The hollow woody tissue in plants that carries water and minerals from the roots to throughout the entire plant

10) What is the scientific name of a Sydney Blue Gum?

  Eucalyptus saligna

11) Which is the only Australian mammal restricted to alpine environments?

  The Mountain Pygmy Possum

12) Why is Merino wool so good at keeping you warm in winter?

  Merino wool fibres are wavy, not straight. Wavy wool traps air which is an excellent insulator. This trapped air can be heated by the body. 'Fine' wool fibres have 12 repeating waves for every cm, where as 'Coarse' wool fibres have less than 2 waves per cm. Merino wool can be 'Super Fine', making an awesome material for warm sweaters

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>100 Free Science Experiments on this site!

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  • Creative chemical concoctions!
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  • Make fake blood & more!
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Coloured shadows
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Vortex rings made with fog
  • Experiments using Newton's Laws
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1300 856 828

5 St James Place,
Seven Hills NSW Australia
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