Sizes of Stars
- Lesson Plan
- Feedback Form
How big is our star? How does it compare to other stars in the universe? How enormous can stars be? In this activity students use math and imagination to construct a scaled model of stellar sizes.
- A metric ruler for every student or small group of students
- Star Classes Table for every student or group
- Objects that can be used to represent stars and the Earth:
- Cherry tomato or small red ball such as a paddle ball (3 cm or about 1 inch in diameter)
- Large grapefruit or yellow ball (14 cm or about 5 inches in diameter)
- Large blue play ball or balloon (diameter of about 43 cm or 17 inches)
- Blue candy sprinkle (to represent Earth)
- Review the concept of scale factors with students. Gather all materials and review teacher background information on main sequence stars (if you choose to go beyond the scale model activity).
- You will want to split your classroom into small groups for the activity.
Follow the Star Sizes directions. Download is below.
A good summary video to show after doing the Star Sizes activity.