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Heating and Cooling
Grade 2 - Science - Building Confidence
Worksheet 1
1The material "water in a tray" changes by freezing. What caused the change?
2What is the result when the material "warm wax" changes by hardening?
3Which process describes the change to water in a tray?
4How could a student try to reverse this change: ice cube becomes liquid water?
5Which order best shows the heating or cooling change for water in a tray?
6The material "chocolate piece" changes by melting. What caused the change?
7What is the result when the material "water in a tray" changes by freezing?
8Which process describes the change to warm wax?
9How could a student try to reverse this change: warm wax becomes solid wax?
10Which order best shows the heating or cooling change for water in a tray?
About this worksheet
Heating and cooling can change materials in observable ways. Some changes, such as melting ice or freezing water, can be reversed by changing the temperature again. Others may be harder to undo, depending on the material and process. Second graders often describe the final state but forget to name what caused the change. This worksheet keeps cause, process, result, and evidence connected. Students identify whether heating or cooling caused a change, name melting or freezing, choose the resulting material, order a short process, and decide how a reversible change could be reversed. Support versions use water and ice. Challenge versions include wax, chocolate, butter, and clay. Encourage your child to ask what temperature change happened first and what observable property changed afterward.
What your child will learn
Connect heating and cooling with material changes
Identify melting, freezing, and hardening
Describe evidence for a changed material
Decide whether a change can be reversed
Worked example
Heating an ice cube can melt it into liquid water. Cooling the water enough can freeze it again.
Common mistake
Naming the result without explaining whether heating or cooling caused it.
Helpful hint
First identify the temperature change, then name the material change.