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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 20 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 claim does this record support?
  3. 3. What was kept the same in this test?
  4. 4. Why is toast different from melted chocolate?
2.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Heat it more
  • B.Let it cool and see if it goes hard again
  • C.Smell it
3.Why heat every material on the same plate?
  • A.So it is tidier
  • B.So the heating is the same and only the material is different
  • C.So it is quicker
4.Which is the best evidence that a change can be reversed?
  • A.The change happened quickly
  • B.The material looks nice afterward
  • C.The material goes back to how it was when it is cooled or warmed again
5.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It is the same as melting
  • B.It is a change that cannot be undone
  • C.It undoes itself overnight
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.Which change in the record could NOT be reversed?
  • A.Bread turning to toast
  • B.Chocolate melting
  • C.Butter melting

LessonPrint · 2-PS1-4 · Set 20 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 20. Prints on its own sheet.

  1. 1.1. It would go back to solid, like the chocolate went hard again. 2. Some changes caused by heating can be reversed and some cannot. 3. All the things were heated on the same plate. 4. The toast stayed toast when it cooled, but the chocolate went hard again.
  2. 2.Let it cool and see if it goes hard again
  3. 3.So the heating is the same and only the material is different
  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.Bread turning to toast

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