10 questions · Four answers, and only one is true. Can you spot it?
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Question 1 of 10
Why does our heart beat?
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It does speed up — but it never stops when we are calm.
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It delivers oxygen and food — about a hundred thousand squeezes a day, without ever being told.
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Being busy all over is what keeps you warm; the heart just pumps.
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It is doing a job, not sending a message.
Show the answer
- A It does speed up — but it never stops when we are calm.
- B It delivers oxygen and food — about a hundred thousand squeezes a day, without ever being told.
- C Being busy all over is what keeps you warm; the heart just pumps.
- D It is doing a job, not sending a message.
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Question 2 of 10
Why do we have bones?
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Three tiny bones do help in each ear — but that is three out of about two hundred.
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Gravity does that for everything, bones or no bones.
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They also give muscles something to pull on. The skull guards the brain, the ribs the heart and lungs.
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Bones do store some things, but food is not one of them.
Show the answer
- A Three tiny bones do help in each ear — but that is three out of about two hundred.
- B Gravity does that for everything, bones or no bones.
- C They also give muscles something to pull on. The skull guards the brain, the ribs the heart and lungs.
- D Bones do store some things, but food is not one of them.
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Question 3 of 10
How do we see things?
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Shut off every light and you see nothing at all, however wide you open your eyes.
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It makes a tiny picture there, upside down — and your brain flips it without ever telling you.
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What travels is light bouncing off them.
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The eye really does make a picture; the brain then reads it.
Show the answer
- A Shut off every light and you see nothing at all, however wide you open your eyes.
- B It makes a tiny picture there, upside down — and your brain flips it without ever telling you.
- C What travels is light bouncing off them.
- D The eye really does make a picture; the brain then reads it.
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Question 4 of 10
How do we move our body?
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It travels down nerves. Muscles can only pull, so they work in teams — one pulls each way.
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A muscle only ever pulls — that is why they come in pairs.
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Blood delivers what muscles need, but it does no pushing.
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A bone is a stiff pole; it cannot move without a muscle.
Show the answer
- A It travels down nerves. Muscles can only pull, so they work in teams — one pulls each way.
- B A muscle only ever pulls — that is why they come in pairs.
- C Blood delivers what muscles need, but it does no pushing.
- D A bone is a stiff pole; it cannot move without a muscle.
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Question 5 of 10
Why do we sneeze?
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And germs. Sensors spot the bother, the brain says go, and out rushes the air.
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A cold nose gives you shivers, not sneezes.
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A sneeze is the blow — it happens whether you want it or not.
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You sneeze on a small breath just as easily.
Show the answer
- A And germs. Sensors spot the bother, the brain says go, and out rushes the air.
- B A cold nose gives you shivers, not sneezes.
- C A sneeze is the blow — it happens whether you want it or not.
- D You sneeze on a small breath just as easily.
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Question 6 of 10
Why do we sleep?
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A sleeping brain is busy; it even dreams.
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People sleep on bright summer evenings, and stay awake in dark winters.
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That is why you wake up refreshed and remember yesterday better.
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You get hungry in the night just the same — breakfast proves it.
Show the answer
- A A sleeping brain is busy; it even dreams.
- B People sleep on bright summer evenings, and stay awake in dark winters.
- C That is why you wake up refreshed and remember yesterday better.
- D You get hungry in the night just the same — breakfast proves it.
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Question 7 of 10
Why do we get goosebumps?
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The bumps are hairs standing up, nothing being pushed.
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Goosebumps come up on warm skin too, at a beautiful piece of music.
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A leftover trick from furry ancestors: on a furry animal it traps warm air and makes them look bigger.
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They arrive all over at once, which no bite does.
Show the answer
- A The bumps are hairs standing up, nothing being pushed.
- B Goosebumps come up on warm skin too, at a beautiful piece of music.
- C A leftover trick from furry ancestors: on a furry animal it traps warm air and makes them look bigger.
- D They arrive all over at once, which no bite does.
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Question 8 of 10
Why do our teeth fall out?
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It loosens the little one. About twenty milk teeth make way for up to thirty-two grown-up ones.
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Milk teeth wobble out on soft food too, at just the right age.
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Brushing matters, but a wobbly milk tooth is good news.
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A milk tooth leaves with its root dissolved, not worn down.
Show the answer
- A It loosens the little one. About twenty milk teeth make way for up to thirty-two grown-up ones.
- B Milk teeth wobble out on soft food too, at just the right age.
- C Brushing matters, but a wobbly milk tooth is good news.
- D A milk tooth leaves with its root dissolved, not worn down.
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Question 9 of 10
Why do we get sick?
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Good food helps you fight, but germs are what make you ill.
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Cold weather alone does not make anyone ill.
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There is a real cause, small enough to be invisible.
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The body sends its own army after them; a fever is part of that fight, and washing hands keeps many out.
Show the answer
- A Good food helps you fight, but germs are what make you ill.
- B Cold weather alone does not make anyone ill.
- C There is a real cause, small enough to be invisible.
- D The body sends its own army after them; a fever is part of that fight, and washing hands keeps many out.
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Question 10 of 10
Why do we get hiccups?
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The tummy has nothing to do with it; the muscle is under the lungs.
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A cough clears that; a hiccup is a twitch.
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It sits under your lungs, and when it jumps your throat snaps shut with a hic.
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The heart carries on quite calmly all through the hiccups.
Show the answer
- A The tummy has nothing to do with it; the muscle is under the lungs.
- B A cough clears that; a hiccup is a twitch.
- C It sits under your lungs, and when it jumps your throat snaps shut with a hic.
- D The heart carries on quite calmly all through the hiccups.
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