Earth Science Second Quiz (Birth of the Earth Video, Half-life. and Earth History).
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A large cloud of gas and dust
In the earliest history of the Earth, what was its structure?
Molecular Clouds
What do scientists call clouds of dust and gas?
No, they’re bigger than Earth.
Are they [Molecular clouds] similar to clouds on Earth? Why or why not?
Gravity
What force in space causes dust and gas to coalesce (contract and solidify)?
Salt
When the scientists does the series of experiments in zero gravity, what was the last material he put in the bag that helped him realize what was happening?
They trade off and they clump up.
What happens to electrons when you have two different materials rubbing together?
4.5 Billion years ago
How long ago did the Earth form?
20 planets
How many planets were there originally in our solar system?