Space Exploration History

What You'll Learn

Earth rotates on its axis once every 24 hours, causing day and night. The side facing the sun experiences day, while the opposite side experiences night.

Key Words

constellation
asteroid

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Calculate your weight on different planets by multiplying your Earth weight by each planet's gravity factor. Make a bar graph of the results.

Step 3 — Observe

Look for patterns in your observations.

Step 4 — Record

Make a graph or chart showing your results.

Check Your Understanding

Question 1

1 of 3

How many planets are in our solar system?