1001
Space
Earth
Earth
Rocks and Minerals
Landscape
Sea
Weather and Climate
Natural Disasters
Resources
Nature
History
Human World
Science and Technology
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What is the Earth's crust made from?
Were the continents once joined to...
Why does a compass needle point north?
How heavy is the Earth?
How are mountain ranges made?
What are block mountains?
Where does volcanic lava come from?
What is air?
Why is the Earth hot inside?
How do the continents move?
What is inside the Earth?
How old is the Earth?
*How can we find out about other pl...*
How can we find out about other planets?
U
nmanned space probes can measure a planet's gravity and density, and whether it has a magnetic field.
the Seasat satellite measuring our own Earth
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1001
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Earth
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Earth