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Grade 4 Science Β· World 8: Force Field Β· Level 54
Gravity Pulls Down
Explain that gravity pulls objects toward Earth, and that heavy and light things fall together without air in the way.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 54
- Drop a ball, and it falls. The force pulling it is gravity. Gravity pulls everything toward the center of Earth.
- Down means toward Earth's center, wherever you stand. That's why people on the other side of the world don't fall off.
- Here's a surprise: heavier things don't fall faster! Drop two same-size balls, one heavy and one light, and they land at about the same time.
- A feather falls slowly only because air holds it back.
- With no air, they fall together. An astronaut showed this on the moon by dropping a hammer and a feather.
Georgia Standards of Excellence in Science:
- S4P3.b β Construct an argument to support the claim that gravitational force affects the motion of an object.