7 questions · Four answers, and only one is true. Can you spot it?
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Question 1 of 7
Why does a cut apple turn brown?
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Oxygen sets off a colour change — a squeeze of lemon juice slows it right down.
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An apple cut with a clean knife and never touched still browns.
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It happens in a dark cupboard too.
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A browned slice is perfectly good to eat.
Show the answer
- A Oxygen sets off a colour change — a squeeze of lemon juice slows it right down.
- B An apple cut with a clean knife and never touched still browns.
- C It happens in a dark cupboard too.
- D A browned slice is perfectly good to eat.
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Question 2 of 7
Why do we like sweet things?
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The liking comes first, long before anyone teaches anything.
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A ripe berry is sweet, and nobody designed it for us.
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So our taste learned to cheer for it: babies like sweet tastes before their very first meal.
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A little energy is useful; a lot of sugar is not good at all.
Show the answer
- A The liking comes first, long before anyone teaches anything.
- B A ripe berry is sweet, and nobody designed it for us.
- C So our taste learned to cheer for it: babies like sweet tastes before their very first meal.
- D A little energy is useful; a lot of sugar is not good at all.
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Question 3 of 7
Why do onions make us cry?
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It drifts up to your eyes, and the tears are your eyes washing the sting away.
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You cry from across the chopping board, untouched.
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It is the eyes that sting, not the nose.
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Your eyes water even while you are laughing about it.
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- A It drifts up to your eyes, and the tears are your eyes washing the sting away.
- B You cry from across the chopping board, untouched.
- C It is the eyes that sting, not the nose.
- D Your eyes water even while you are laughing about it.
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Question 4 of 7
Why do we get hungry?
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A smell can make you keener; it is not what starts the hunger.
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Habit helps, but you can be ravenous well before lunch.
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A tummy gurgles when it is empty *and* when it is full.
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So the brain sends a “time to eat” signal. Eat, and the signal stops.
Show the answer
- A A smell can make you keener; it is not what starts the hunger.
- B Habit helps, but you can be ravenous well before lunch.
- C A tummy gurgles when it is empty *and* when it is full.
- D So the brain sends a “time to eat” signal. Eat, and the signal stops.
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Question 5 of 7
Where does milk come from?
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Milk comes only from animals that feed their young this way.
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The cow's body makes the milk; the grass is only her dinner.
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The dairy chills and bottles it — the cow made it.
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Goats, sheep and camels make milk for their babies too.
Show the answer
- A Milk comes only from animals that feed their young this way.
- B The cow's body makes the milk; the grass is only her dinner.
- C The dairy chills and bottles it — the cow made it.
- D Goats, sheep and camels make milk for their babies too.
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Question 6 of 7
How is bread made?
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The bubbles are made by the yeast, long before the oven.
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Flour and water make the dough, the bubbles make it soft, and the oven sets them and browns the crust.
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Bread flour comes from grain such as wheat.
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It rises because something inside it is making gas.
Show the answer
- A The bubbles are made by the yeast, long before the oven.
- B Flour and water make the dough, the bubbles make it soft, and the oven sets them and browns the crust.
- C Bread flour comes from grain such as wheat.
- D It rises because something inside it is making gas.
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Question 7 of 7
How does popcorn pop?
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Nothing grows — it turns itself inside out.
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It pushes harder and harder until the kernel bursts inside-out — which is why only corn with a tough skin will pop.
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The push comes from inside the kernel.
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Popcorn pops in a hot-air popper with no oil at all.
Show the answer
- A Nothing grows — it turns itself inside out.
- B It pushes harder and harder until the kernel bursts inside-out — which is why only corn with a tough skin will pop.
- C The push comes from inside the kernel.
- D Popcorn pops in a hot-air popper with no oil at all.
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