Seasons: Why They Change (Part 5)

What You'll Learn

Earth revolves around the sun once every 365.25 days, creating a year. The tilt of Earth's axis (23.5 degrees) causes the seasons as different hemispheres receive more direct sunlight.

Key Words

orbit
rotation

Materials Needed

paper plate
markers
string
tape
pencil

Safety First

Handle glass items carefully to avoid breakage.
Do not mix unknown chemicals together.

Steps

Step 1 — Read

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

Step 2 — Do

Track the moon's phase each night for two weeks. Draw what you see and identify the pattern.

Step 3 — Observe

Watch carefully for any changes and note the time.

Step 4 — Record

Create a data table to organize your measurements.

Check Your Understanding

Question 1

1 of 3

What causes the seasons?