Our planet
Our planet
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Why does a day have 24 hours?
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Does the sun go to sleep at night?
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What is the equator?
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What is evolution?
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Why is fire hot?
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What is global warming?
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Where does all the water go at low tide?
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Why do I have a shadow?
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Why is the sky blue?
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Why does the sky change color at sunset?
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Why does the sun rise in one place and set in another?
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What is color made of?
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Why does the moon shine?
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Why does the sun shine?
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Why don't we fall off the Earth?
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What are seasons?
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Does it snow in Africa?
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Why is there a different time in Australia?
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Why is the Earth round?
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Why can I see the moon during the daytime?
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Why does the Earth rotate?
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Why is the sun yellow?
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Is today already tomorrow?
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Where do stars go during the day?
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Will the Earth ever stop spinning?
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Why is it so cold in winter?
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What is holding up the Earth?
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What is Density?
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How big is the Earth?
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What is air?
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Which countries does the equator run through?
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What is gravity?
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How many people are on Earth?
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What is the ozone layer?
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How was the Earth made?
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Why is the sky black at night?
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When was the beginning of time?
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Why are there three primary colors?
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Why don't we rotate but the Earth does?
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Why does my shadow move?
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What is the prime meridian?
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What is a solstice?
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How fast does sound travel?
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How fast does light travel?
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What are fossil fuels?
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What is an equinox?