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What happens when we heat it?

2nd grade (Year 3 in England) · 16 questions · Common Core: NGSS.2-PS1-4 · England: KS1 Y2 Uses of everyday materials, KS2 Y4 States of matter

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1
Question 1
What happens when you heat this: popcorn kernels in a pan?
- A. melts into a liquid
- B. rises and becomes a spongy solid
- C. burst open and puff up
- D. boils and turns to steam
2
Question 2
Why should you never leave a chocolate bar on a sunny car seat?
- A. It will turn into a cake.
- B. It will freeze.
- C. The heat will melt it.
- D. It will disappear.
3
Question 3
True or false? Heating always makes things go hard.
- A. True
- B. False
4
Question 4
What happens when you heat this: cake batter in the oven?
- A. burst open and puff up
- B. melts into a liquid
- C. rises and becomes a spongy solid
- D. turns brown and crunchy
5
Question 5
Why should you never leave a chocolate bar on a sunny car seat?
- A. It will turn into a cake.
- B. The heat will melt it.
- C. It will freeze.
- D. It will disappear.
6
Question 6
True or false? Heating water enough makes it boil.
- A. True
- B. False
7
Question 7
What happens when you heat this: water in a kettle?
- A. melts into a liquid
- B. rises and becomes a spongy solid
- C. turns brown and crunchy
- D. boils and turns to steam
8
Question 8
Steam rises from a boiling pot of pasta. What is the steam?
- A. air that turned white
- B. melted metal
- C. smoke from burning pasta
- D. water that has turned into a gas
9
Question 9
True or false? Toast can be turned back into bread by cooling it.
- A. True
- B. False
10
Question 10
What happens when you heat this: a raw egg in a pan?
- A. boils and turns to steam
- B. turns brown and crunchy
- C. turns white and firm
- D. melts into a liquid
11
Question 11
Why should you never leave a chocolate bar on a sunny car seat?
- A. It will turn into a cake.
- B. It will freeze.
- C. The heat will melt it.
- D. It will disappear.
12
Question 12
True or false? Heating can cook food and change it for good.
- A. True
- B. False
13
Question 13
What happens when you heat this: water in a kettle?
- A. boils and turns to steam
- B. burst open and puff up
- C. turns white and firm
- D. melts into a liquid
14
Question 14
A clay model is soft. How can you make it hard and strong for good?
- A. Put it in the fridge.
- B. Squash it.
- C. Leave it in water.
- D. Bake (fire) it in a kiln.
15
Question 15
True or false? Heating can cook food and change it for good.
- A. True
- B. False
16
Question 16
What happens when you heat this: cake batter in the oven?
- A. boils and turns to steam
- B. rises and becomes a spongy solid
- C. turns white and firm
- D. melts into a liquid

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Answer key: What happens when we heat it?

1. C. burst open and puff up
2. C. The heat will melt it.
3. B. False
4. C. rises and becomes a spongy solid
5. B. The heat will melt it.
6. A. True
7. D. boils and turns to steam
8. D. water that has turned into a gas
9. B. False
10. C. turns white and firm
11. C. The heat will melt it.
12. A. True
13. A. boils and turns to steam
14. D. Bake (fire) it in a kiln.
15. A. True
16. B. rises and becomes a spongy solid