True or False? Earth is a perfect sphere

Which of the following is NOT one of Earth's major systems?

The force of gravity between two objects depends on the objects' ________________

Density is:

Which layer of Earth is the least dense?

As you go deeper in to Earth:

The plastic layer within the mantle

What is the correct order of the layers of the Earth, starting from the inside and working to the top?

Ture or false? The inner core of the Earth spins faster than the Outer Core?

The outer part of the magnetic field that interacts with cosmic rays and charged particles coming from the sun is___________

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