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Heated, Then Cooled Again is a free printable Grade 2 science worksheet on using a heating record as evidence for which changes reverse, aligned to NGSS performance expectation 2-PS1-4. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 18 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Heated, Then Cooled Again

2-PS1-4

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Heated, Then Cooled Again

What happened to four things heated on a warm plate and then left to cool. HEATED, THEN LEFT TO COOL Chocolate ..... melted, then went hard again Butter ........ melted, then went hard again Water ......... turned to steam; the lid dripped water again Bread ......... turned to toast; it stayed toast Egg ........... turned solid; it stayed solid All were heated on the same plate.

  1. 1. What happened to the bread?
  2. 2. Why is toast different from melted chocolate?
  3. 3. What was kept the same in this test?
  4. 4. Which changes went back when things cooled?
2.Butter and chocolate both melted and went hard again. What do these two have in common?
  • A.Both were burnt
  • B.Neither changed at all
  • C.Both changes could be reversed by cooling
3.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Eggs are always solid
  • B.Cooling undoes every change
  • C.Cooking an egg is a change that cannot be reversed
4.Water turned to steam, and drops formed on the lid. What does that show?
  • A.Lids make water
  • B.The water was destroyed
  • C.The water came back, so boiling it can be reversed
5.Which change in the record could NOT be reversed?
  • A.Chocolate melting
  • B.Bread turning to toast
  • C.Butter melting
6.Which is the best evidence that a change can be reversed?
  • A.The change happened quickly
  • B.The material goes back to how it was when it is cooled or warmed again
  • C.The material looks nice afterward
7.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Smell it
  • B.Heat it more
  • C.Let it cool and see if it goes hard again

LessonPrint · 2-PS1-4 · Set 18 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 18. Prints on its own sheet.

  1. 1.1. It turned to toast, and it stayed toast. 2. The toast stayed toast when it cooled, but the chocolate went hard again. 3. All the things were heated on the same plate. 4. The chocolate, the butter and the water all went back.
  2. 2.Both changes could be reversed by cooling
  3. 3.Cooking an egg is a change that cannot be reversed
  4. 4.The water came back, so boiling it can be reversed
  5. 5.Bread turning to toast
  6. 6.The material goes back to how it was when it is cooled or warmed again
  7. 7.Let it cool and see if it goes hard again

Last reviewed 2026-09-05. Aligned to 2-PS1-4 of the Next Generation Science Standards.