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Lesson 34 of 84 · Matter
LessonCatalysts: Speeding Up Reactions
What You'll Learn
Matter exists in three common states: solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a fixed volume but take the shape of their container, and gases fill any container.
Key Words
- solid
- liquid
Steps
Step 1 — Read
Review the background information on Matter before starting.
Step 2 — Do
Separate a mixture of sand, salt, and iron filings using a magnet, water, and a filter. Record each step and what you separated.
Step 3 — Observe
Compare the before and after states.
Step 4 — Record
Write your conclusion: did the results match your hypothesis? What would you change next time?
Check Your Understanding
Question 1
1 of 3Which is an example of a chemical change?