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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 6 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. What happened to the chocolate?
  3. 3. What would happen to a melted ice cube left in a freezer?
  4. 4. What claim does this record support?
2.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Eggs are always solid
  • B.Cooking an egg is a change that cannot be reversed
  • C.Cooling undoes every change
3.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It is a change that cannot be undone
  • B.It is the same as melting
  • C.It undoes itself overnight
4.Which is the best evidence that a change can be reversed?
  • A.The material looks nice afterward
  • B.The change happened quickly
  • C.The material goes back to how it was when it is cooled or warmed again
5.Water turned to steam, and drops formed on the lid. What does that show?
  • A.Lids make water
  • B.The water came back, so boiling it can be reversed
  • C.The water was destroyed
6.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Smell it
  • B.Let it cool and see if it goes hard again
  • C.Heat it more
7.A student says "heating always changes things for good." Which result shows that is wrong?
  • A.The egg turned solid
  • B.The bread turned to toast
  • C.The chocolate went hard again when it cooled

LessonPrint · 2-PS1-4 · Set 6 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 6. Prints on its own sheet.

  1. 1.1. All the things were heated on the same plate. 2. It melted, then went hard again. 3. It would go back to solid, like the chocolate went hard again. 4. Some changes caused by heating can be reversed and some cannot.
  2. 2.Cooking an egg is a change that cannot be reversed
  3. 3.It is a change that cannot be undone
  4. 4.The material goes back to how it was when it is cooled or warmed again
  5. 5.The water came back, so boiling it can be reversed
  6. 6.Let it cool and see if it goes hard again
  7. 7.The chocolate went hard again when it cooled

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