7
Lesson 7 of 84 · Matter and Atoms
ExperimentWhat Is a Chemical Reaction?
What You'll Learn
In a chemical reaction, substances called reactants are transformed into new substances called products. The total mass stays the same because atoms are rearranged, not created or destroyed.
Key Words
- electron
- ion
Materials Needed
- ice cubes
- salt
- sugar
- vinegar
- baking soda
Safety First
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Step 1 — Read
Read and learn: In a chemical reaction, substances called reactants are transformed into new substances called products. The total mass stays the same because atoms are rearranged, not created or destroyed.
Step 2 — Do
Repeat the experiment two more times for accuracy.
Step 3 — Observe
Note any unexpected results.
Step 4 — Record
Share your findings with the class or a partner.
Check Your Understanding
Question 1
1 of 3What is a mixture?