Clouds and Weather Prediction

What You'll Learn

Clouds form when water vapor rises, cools, and condenses on tiny particles in the atmosphere. Different cloud types—cumulus, stratus, cirrus—indicate different weather conditions.

Key Words

watershed
erosion
weathering

Materials Needed

newspaper
spray bottle
cups
thermometer

Safety First

Use materials only as directed in the experiment.
Keep small objects away from young children.
Work in a well-ventilated area when using vinegar or other strong-smelling substances.

Steps

Step 1 — Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 — Do

Model erosion: tilt a tray of soil and pour water from a cup at the top. Observe how channels form. Try adding plants or rocks to slow the erosion.

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 is precipitation?