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Heating and cooling

2nd grade (Year 3 in England) · 16 questions · Common Core: NGSS.2-PS1-4 · England: KS1 Y2 Uses of everyday materials, KS2 Y5 Properties and changes of materials

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  1. Question 1

    Ice cream is left in the sun and melts. Then it is put back in the freezer. Is it the same as before?

    • A. It stays a liquid in the freezer.
    • B. It freezes solid again, though it may be icier and harder than before.
    • C. It burns.
    • D. It turns into milk powder.

  2. Question 2

    Three of these changes CANNOT be undone. Which one is different?

    • A. popping popcorn
    • B. frying an egg
    • C. water freezing into ice cubes
    • D. toasting bread

  3. Question 3

    Can this change be undone: toasting bread?

    • A. can change back
    • B. cannot change back

  4. Question 4

    Melted chocolate is poured into a mould and put in the fridge. What happens?

    • A. It turns into cake.
    • B. It turns solid again, in the mould's shape.
    • C. It turns into water.
    • D. It stays liquid for ever.

  5. Question 5

    Three of these changes CAN be undone. Which one is different?

    • A. water freezing into ice cubes
    • B. baking a cake
    • C. candle wax melting
    • D. chocolate melting in a warm hand

  6. Question 6

    Can this change be undone: candle wax melting?

    • A. can change back
    • B. cannot change back

  7. Question 7

    Clay is shaped into a pot and baked in a very hot kiln. Can it go back to soft clay if you add water?

    • A. No, firing changes it for good.
    • B. Yes, if you shake it.
    • C. Yes, straight away.
    • D. Yes, if you put it in the freezer.

  8. Question 8

    Three of these changes CANNOT be undone. Which one is different?

    • A. toasting bread
    • B. frying an egg
    • C. butter softening in a warm kitchen
    • D. burning a log on a fire

  9. Question 9

    Can this change be undone: water freezing into ice cubes?

    • A. can change back
    • B. cannot change back

  10. Question 10

    Clay is shaped into a pot and baked in a very hot kiln. Can it go back to soft clay if you add water?

    • A. Yes, if you put it in the freezer.
    • B. Yes, if you shake it.
    • C. Yes, straight away.
    • D. No, firing changes it for good.

  11. Question 11

    Three of these changes CAN be undone. Which one is different?

    • A. butter softening in a warm kitchen
    • B. candle wax melting
    • C. popping popcorn
    • D. chocolate melting in a warm hand

  12. Question 12

    Can this change be undone: frying an egg?

    • A. can change back
    • B. cannot change back

  13. Question 13

    Clay is shaped into a pot and baked in a very hot kiln. Can it go back to soft clay if you add water?

    • A. Yes, if you put it in the freezer.
    • B. Yes, straight away.
    • C. No, firing changes it for good.
    • D. Yes, if you shake it.

  14. Question 14

    Three of these changes CANNOT be undone. Which one is different?

    • A. burning a log on a fire
    • B. popping popcorn
    • C. toasting bread
    • D. chocolate melting in a warm hand

  15. Question 15

    Can this change be undone: baking a cake?

    • A. can change back
    • B. cannot change back

  16. Question 16

    Ice cream is left in the sun and melts. Then it is put back in the freezer. Is it the same as before?

    • A. It turns into milk powder.
    • B. It burns.
    • C. It stays a liquid in the freezer.
    • D. It freezes solid again, though it may be icier and harder than before.

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  1. It freezes solid again, though it may be icier and harder than before.
  2. water freezing into ice cubes
  3. cannot change back
  4. It turns solid again, in the mould's shape.
  5. baking a cake
  6. can change back
  7. No, firing changes it for good.
  8. butter softening in a warm kitchen
  9. can change back
  10. No, firing changes it for good.
  11. popping popcorn
  12. cannot change back
  13. No, firing changes it for good.
  14. chocolate melting in a warm hand
  15. cannot change back
  16. It freezes solid again, though it may be icier and harder than before.