Heating and Cooling

Answer Key - Grade 2 Science Worksheet - Challenge Me

Write R or I.

1. Read this first

   Tip

   A reversible change (R) can be undone. Ice melts, and you can freeze the water again. An irreversible change (I) cannot be undone. A baked cake cannot turn back into batter.

2. 1.

   Cheese hardening as it cools R

3. 2.

   Warm honey getting runny R

4. 3.

   Baking cookie dough I

5. 4.

   Frying bacon I

6. 5.

   Water boiling into steam R

7. 6.

   Boiling an egg until hard I

8. 7.

   Ice cream melting R

9. 8.

   Baking bread I