42
Lesson 42 of 84 · Matter
ExperimentFreezing and Melting (Part 2)
What You'll Learn
Some changes can be reversed (melting ice) and some cannot (baking a cake).
Key Words
- cool
- mixture
- material
Materials Needed
- ice cubes
- salt
- sugar
- vinegar
- baking soda
Safety First
- Wear safety goggles when mixing liquids.
- Wash hands after handling materials.
- Be careful with scissors — ask an adult for help if needed.
Steps
Step 1 — Read
Read and learn: Some changes can be reversed (melting ice) and some cannot (baking a cake).
Step 2 — Do
Measure using your ruler or measuring cup.
Step 3 — Observe
Use your senses to describe what you notice.
Step 4 — Record
Write 1-2 sentences about what happened.
Check Your Understanding
Question 1
1 of 3What happens when you mix baking soda and vinegar?