Earth

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The Earth core is actually comprised of two parts:

a solid metal inner core and a liquid metal outer core

The atmosphere of the Earth is approximately:

78% nitrogen, 21% oxygen, 1% argon

According to Phil, the Earth needs this to support life:

All other answers are correct

Although it is only a tiny fraction of the Earth's atmosphere, this chemical compound plays a large role in the Earth's "Greenhouse Effect".

Carbon dioxide

The atmosphere of the Earth is said to extend to:

100 km above the Earth surface which is also called the Karman Line

The Earth magnetic field is generated in the molten outer core of the Earth and:

all other answers are correct

The four rocky, denser planets that are closer to our sun are known as the:

terrestrial planets

Which of the following is not a reason that the Earth's core is hot?

the heat of the sun shining on the Earth

The crust of the Earth is made from lower density rock, which means that it floats on the Mantle. How are oceanic and continental crusts different?

the oceanic crusts are thinner than continental crusts

The continents move at about:

the same rate your fingernails grow


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