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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 4 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 would happen to a melted ice cube left in a freezer?
  2. 2. What was kept the same in this test?
  3. 3. Why is toast different from melted chocolate?
  4. 4. Which changes went back when things cooled?
2.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It undoes itself overnight
  • B.It is the same as melting
  • C.It is a change that cannot be undone
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.The water was destroyed
  • C.Lids make water
4.Which change in the record could NOT be reversed?
  • A.Bread turning to toast
  • B.Butter melting
  • C.Chocolate melting
5.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
6.Butter and chocolate both melted and went hard again. What do these two have in common?
  • A.Both changes could be reversed by cooling
  • B.Neither changed at all
  • C.Both were burnt
7.Melted chocolate went hard again when it cooled. What does that show?
  • A.All changes go back
  • B.Melting chocolate is a change that can be reversed
  • C.Chocolate cannot be heated

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

Answer key — Heated, Then Cooled Again

Set 4. Prints on its own sheet.

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