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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 19 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 was kept the same in this test?
  2. 2. Which changes went back when things cooled?
  3. 3. Why is toast different from melted chocolate?
  4. 4. What claim does this record support?
2.Which change in the record could NOT be reversed?
  • A.Bread turning to toast
  • B.Chocolate melting
  • C.Butter melting
3.Water turned to steam, and drops formed on the lid. What does that show?
  • A.The water came back, so boiling it can be reversed
  • B.Lids make water
  • C.The water was destroyed
4.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
5.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It is a change that cannot be undone
  • B.It undoes itself overnight
  • C.It is the same as melting
6.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Cooking an egg is a change that cannot be reversed
  • B.Eggs are always solid
  • C.Cooling undoes every change
7.Melted chocolate went hard again when it cooled. What does that show?
  • A.Melting chocolate is a change that can be reversed
  • B.Chocolate cannot be heated
  • C.All changes go back

LessonPrint · 2-PS1-4 · Set 19 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 19. Prints on its own sheet.

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

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