Endothermic and Exothermic 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

concentration
plasma

Materials Needed

baking soda
cups
spoons
food coloring
plastic bottles

Safety First

Do not look directly at the sun or bright lights.

Steps

Step 1 — Read

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

Step 2 — Do

Build a model of an atom using craft supplies. Show protons, neutrons, and electrons in the correct arrangement. Label each particle.

Step 3 — Observe

Use your senses (except taste) to describe what you notice.

Step 4 — Record

Write a summary of your findings in 3-5 sentences.

Check Your Understanding

Question 1

1 of 3

What are the three common states of matter?