Q:

What is the shape of the Earth?

A:

The shape of the Earth is classified as an ellipsoid or an oblate spheroid. The Earth is not considered a true sphere because it has a larger circumference and diameter at the equator. The poles of the Earth are squished, which creates a slight bulge around the equator.

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Full Answer

Gravity is a force that causes planets to form the shape of a sphere by pulling the mass of the planet close to the center of gravity. In the case of the Earth, gravity pulls the planet as close to the core as possible. The sphere-like shape of the Earth is distorted slightly by the centrifugal force of its rotation. This force causes the mass of the planet to move away from the center of gravity, which is located at the equator. For that reason, there is a minor outward bulge at the equator, creating a larger circumference and diameter.

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    How was Earth formed?

    A:

    While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.

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  • Q:

    How long is a day on Earth?

    A:

    According to Universe Today, the duration of a day on Earth is the time it takes for the planet to complete a rotation around its axis. The Earth’s rotation takes 23 hours, 56 minutes and 4.1 seconds.

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    What is the volume of the Earth?

    A:

    The volume of the Earth is 1.44 x 10^21 cubic yards or 2.63 x 10^10 cubic miles. This is found by taking the diameter of the Earth, which is roughly 7,962 miles at the equator, and applying the formula, V = 4/3 pi r^3.

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    How did the Earth begin?

    A:

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