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Earth & space

Weather, oceans, seasons, the moon, orbits.

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Earth & space Storybook Why do we have seasons? spaceearth Open the story Earth & space Storybook How does your phone know exactly where you are? spacesatellites Open the story Earth & space Experiment Why do clouds float? weatherclouds Try it out Earth & space Experiment Why Does It Rain? weatherrain Try it out Earth & space Experiment Why does wind blow? weatherwind Try it out Earth & space Experiment Why do you see lightning way before you hear the thunder? weatherthunder Try it out Earth & space Experiment Why do we have tides? oceanstides Try it out Earth & space Experiment Why does the Moon change shape every night? spacemoon Try it out Earth & space Experiment Why isn't there an eclipse every single month? spaceeclipses Try it out Earth & space Experiment Why does a volcano explode instead of just oozing? earthvolcanoes Try it out Earth & space Experiment Why does the day stay light longer in summer? earthseasons Try it out Earth & space Experiment Why does it get colder the higher up a mountain you go? weathertemperature Try it out Earth & space Experiment Why does a hurricane spin in a circle? weatherhurricanes Try it out Earth & space Experiment Why does the ocean stay salty but rain is fresh? oceanswater Try it out Earth & space Experiment Why does a planet's year get longer the farther out it is? spaceorbits Try it out Earth & space Experiment Why does fog appear in the morning and then vanish? weatherfog Try it out Earth & space Experiment Why does the wind near the coast switch direction between day and night? weatherwind Try it out Earth & space Experiment Why do hailstones grow big in summer, the hottest time of year? weatherhail Try it out Earth & space Experiment Why is it pitch dark at night when space is full of stars? spacestars Try it out Earth & space Experiment Why does the wind make giant waves out at sea but not in a pond? oceanswaves Try it out Earth & space Experiment Why does dropping air pressure tell you a storm is coming? weatherpressure Try it out Earth & space Storybook The Moon keeps one face toward us — so is it spinning, or frozen still? moonorbit Open the story Earth & space Storybook Why do waves break at the shore? wavesocean Open the story Earth & space Storybook Which journey rounds a grain more? rockserosion Open the story Earth & space Storybook How fast does the Sun's pull fade? gravityspace Open the story