Catalysts: Speeding Up Reactions (Part 2)

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 Properties of 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 3

Which is an example of a chemical change?