Skip to content
LessonPrint

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

Next set

One paper per student

12345678910111213141516171819202122232425

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. Why is toast different from melted chocolate?
  3. 3. What happened to the bread?
  4. 4. What was kept the same in this test?
2.Which change in the record could NOT be reversed?
  • A.Butter melting
  • B.Bread turning to toast
  • C.Chocolate melting
3.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
4.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Cooling undoes every change
  • B.Cooking an egg is a change that cannot be reversed
  • C.Eggs are always solid
5.Why heat every material on the same plate?
  • A.So the heating is the same and only the material is different
  • B.So it is tidier
  • C.So it is quicker
6.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Heat it more
  • B.Smell it
  • C.Let it cool and see if it goes hard again
7.A student says "heating always changes things for good." Which result shows that is wrong?
  • A.The chocolate went hard again when it cooled
  • B.The egg turned solid
  • C.The bread turned to toast

LessonPrint · 2-PS1-4 · Set 5 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 5. Prints on its own sheet.

  1. 1.1. It would go back to solid, like the chocolate went hard again. 2. The toast stayed toast when it cooled, but the chocolate went hard again. 3. It turned to toast, and it stayed toast. 4. All the things were heated on the same plate.
  2. 2.Bread turning to toast
  3. 3.The material goes back to how it was when it is cooled or warmed again
  4. 4.Cooking an egg is a change that cannot be reversed
  5. 5.So the heating is the same and only the material is different
  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.