Wind and Air Pressure (Part 2)

What You'll Learn

Caves form when slightly acidic water dissolves limestone over thousands of years. Stalactites hang from the ceiling and stalagmites grow from the floor as minerals are deposited.

Key Words

precipitation
water cycle
natural resource

Materials Needed

rain gauge
cotton balls
food coloring
clear container
rocks
sand

Safety First

Keep small objects away from young children.

Steps

Step 1 — Read

Review the background information on The Water Cycle before starting.

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

Observe what happens and describe it in detail.

Step 4 — Record

Record your observations in your science journal with measurements and descriptions.

Check Your Understanding

Question 1

1 of 3

What is sediment?