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Keep it hot or keep it cold

4th grade (Year 5 in England) · 16 questions · Common Core: NGSS.4-PS3-2, NGSS.SEP 3 · England: KS2 Y5 Properties and changes of materials

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Date

Score/ 16

Question 1
The water started at 70 °C. How many degrees did the cup with cotton cool down in 20 minutes?
Answer°C
2
Question 2
Is this a thermal conductor or a thermal insulator: wood?
- A. thermal conductor (lets heat through easily)
- B. thermal insulator (slows heat down)
3
Question 3
Why does insulating a house's loft (attic) help the planet?
- A. It makes the house colder.
- B. Less heat escapes, so less fuel is burned for heating.
- C. It stops rain.
- D. Insulation makes electricity.
Question 4
The water started at 70 °C. How many degrees did the cup with paper cool down in 20 minutes?
Answer°C
5
Question 5
Is this a thermal conductor or a thermal insulator: wool?
- A. thermal conductor (lets heat through easily)
- B. thermal insulator (slows heat down)
6
Question 6
Why does insulating a house's loft (attic) help the planet?
- A. It stops rain.
- B. It makes the house colder.
- C. Insulation makes electricity.
- D. Less heat escapes, so less fuel is burned for heating.
Question 7
The water started at 70 °C. How many degrees did the cup with no wrap cool down in 20 minutes?
Answer°C
8
Question 8
Is this a thermal conductor or a thermal insulator: iron?
- A. thermal conductor (lets heat through easily)
- B. thermal insulator (slows heat down)
9
Question 9
Why do polar bears and penguins stay warm in freezing weather?
- A. They are made of metal.
- B. They make cold air warmer.
- C. Thick fur, feathers and fat are good thermal insulators.
- D. Their bodies never lose any heat.
Question 10
The water started at 70 °C. How many degrees did the cup with wool cool down in 20 minutes?
Answer°C
11
Question 11
Is this a thermal conductor or a thermal insulator: steel?
- A. thermal conductor (lets heat through easily)
- B. thermal insulator (slows heat down)
12
Question 12
A cool box keeps drinks cold on a hot day. What is it lined with?
- A. nothing, just air holes
- B. black paint
- C. a thermal insulator like plastic foam
- D. thin copper sheets
Question 13
The water started at 70 °C. How many degrees did the cup with paper cool down in 20 minutes?
Answer°C
14
Question 14
Is this a thermal conductor or a thermal insulator: cork?
- A. thermal conductor (lets heat through easily)
- B. thermal insulator (slows heat down)
15
Question 15
A cool box keeps drinks cold on a hot day. What is it lined with?
- A. thin copper sheets
- B. a thermal insulator like plastic foam
- C. nothing, just air holes
- D. black paint
Question 16
The water started at 70 °C. How many degrees did the cup with cotton cool down in 20 minutes?
Answer°C

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Answer key: Keep it hot or keep it cold

1. 13 °C
2. B. thermal insulator (slows heat down)
3. B. Less heat escapes, so less fuel is burned for heating.
4. 22 °C
5. B. thermal insulator (slows heat down)
6. D. Less heat escapes, so less fuel is burned for heating.
7. 29 °C
8. A. thermal conductor (lets heat through easily)
9. C. Thick fur, feathers and fat are good thermal insulators.
10. 8 °C
11. A. thermal conductor (lets heat through easily)
12. C. a thermal insulator like plastic foam
13. 20 °C
14. B. thermal insulator (slows heat down)
15. B. a thermal insulator like plastic foam
16. 14 °C