Types of Rocks: Igneous (Part 2)

What You'll Learn

Sedimentary rocks form in layers, with the oldest layers at the bottom. Geologists use these layers to determine the relative age of rocks and the fossils they contain.

Key Words

volcano
atmosphere
humidity

Materials Needed

thermometer
rain gauge
cotton balls
food coloring
clear container
rocks

Safety First

Adult supervision recommended.

Steps

Step 1 — Read

Study the diagram and label the parts you recognize.

Step 2 — Do

Set up a weather station: use a thermometer, rain gauge (a jar with a ruler), and wind sock (a plastic bag on a stick). Record data for one week.

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 are the three types of rocks?