Explorers · Ages 7–10 · first steps· λ = 650 nm

Forces All Around

Why does a rolling ball stop? Why do a hammer and a feather fall together on the Moon? Why does a steel ship float when a pebble sinks? Three experiments, three big ideas.

3 lessons 26 min 130 XP

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Lessons

1🛒Pushes and pullsA force is a push or a pull. It can start things, stop them and turn them.8 min40 XP
2🪶Why things fallGravity pulls everything down. But do heavy things really fall faster?9 min45 XP
3⛵Float or sink?A giant steel ship floats but a tiny pebble sinks. The secret is density.9 min45 XP