The Particle Model of Matter

What You'll Learn

A mixture contains two or more substances that are not chemically combined. You can often separate a mixture using physical methods like filtering, evaporating, or using a magnet.

Key Words

melting
freezing

Materials Needed

paper towels
thermometer
strainer
ice cubes
salt

Safety First

Keep small objects away from young children.

Steps

Step 1 — Read

Read about Matter and Reactions and write down three key facts.

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

Draw a detailed diagram of what you observe.

Step 4 — Record

Write a conclusion: what did your results show? Did they match your prediction?

Check Your Understanding

Question 1

1 of 3

What is sublimation?