10
Lesson 10 of 84 · Space
ExperimentHow Far Is a Light-Year?
What You'll Learn
Light from the sun takes about 8 minutes to reach Earth. A light-year is the distance light travels in one year—about 9.5 trillion kilometers.
Key Words
- asteroid
- comet
- solar system
Materials Needed
- compass
- black paper
- foil
- scissors
- flashlight
- ball (Earth)
Safety First
- Protect your work surface with newspaper or plastic.
- Adult supervision recommended.
- Do not taste any materials.
Steps
Step 1 — Read
Study the diagram and label the parts you recognize.
Step 2 — Do
Use a flashlight, a large ball, and a small ball to model eclipses. Show both a solar eclipse and a lunar eclipse.
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 3Which planet is known as the Red Planet?