- Which of the following best describes Earth’s shape?
A. disk
B. circle
C. sphere
D. plane - Earth’s gravity pulls an object toward its ____________________.
- Which model do you find most useful to explain gravity and its effects? Why?
- Tennis ball and rubber band?
- Styrofoam ball and toothpicks?
- Circle on paper with arrows? - Why are models helpful at explaining complex scientific concepts like gravity?
- Do you think the moon is affected by Earth’s gravity? If so, why doesn’t it fall “down” toward the Earth?
- Why doesn’t a plane or bird fall from the sky?
- Does gravity ever stop working? Do any forces ever cancel out gravity or reverse it? Explain.
- Why is this lesson on gravity a good time to teach about craters?
Questions
1. C. sphere
2. center
3. Styrofoam ball and toothpicks because they show how people stick to the earth and don't fall off.
4. Models are helpful because they can show how things stick or fall.
5. the moon is affected by earths gravity because every day, month, or year the moon gets closer to earth, and the moon does fall tword the earth.
6. A plane or bird doesn't fall from the sky because they have their own forse pulling them higher up.
7. No forces ever reverse gravity but planes and birds can cancel gravity for only them.
8. Because craters are created by gravity.