13
Lesson 13 of 84 · Space
LessonNebulae: Star Nurseries
What You'll Learn
Gravity keeps planets in orbit around the sun and moons in orbit around planets. The strength of gravity depends on mass and distance between objects.
Key Words
- gravity
- light-year
Steps
Step 1 — Read
Read and learn: Gravity keeps planets in orbit around the sun and moons in orbit around planets. The strength of gravity depends on mass and distance between objects.
Step 2 — Do
Create a labeled diagram of what you built or observed.
Step 3 — Observe
Compare the before and after states.
Step 4 — Record
Write your conclusion: did the results match your hypothesis?
Check Your Understanding
Question 1
1 of 3What is a comet?