Structure of the earth Flashcards
How did the moon form?
A large planetesimal gave earth a blow taking a chunk out of earth’s crust into space. This chunk started to orbit earth and is the moon
Why does the earth have seasons?
The moon formation knocked earth sideways changing the angle from 0-23.5 degrees.
Why does the earth have different layers?
The temperature of earth reached 2000C making the core form. Gradually the earth cooled creating the layers.
What are the crusts properties?
0-400C, ade of two types of sold rocks (oceanic and continental), 5-50 km thick
What are the mantles properties?
2900 km thick, 1400-3000C, semi molten magma/solid
What are the outer cores properties?
1300 km thick, 4000-6000C, liquid made of iron and nickle
What are the inner cores properties?
2200 km thick, 5000-6000C, solid made of iron and nickle
What are the four layers of earth in order?
crust, mantle, inner core, outer core