NASA discovers three things that impact Earth's spin

The video discusses the impact of large glaciers on Earth's surface, explaining how they compress the planet and cause it to bulge. As glaciers melt, the land regains its shape, a process known as glacial rebound, which contributes to Earth's axis wobble. The melting of ice, driven by greenhouse gases, accounts for a significant portion of this wobble. Additionally, mantle convection, involving the movement of molten rock, redistributes Earth's mass and affects its spin.

What effect do large glaciers have on the Earth's shape?

• They cause the Earth to shrink.

• They make the Earth spin faster.

• They have no effect on the Earth's shape.

• They compress the Earth, causing it to bulge outward.

What is the process called when land regains its shape after glaciers melt?

• Glacial Rebound

• Tectonic Shift

• Plate Movement

• Erosion

How much does glacial rebound contribute to Earth's axis wobble each year?

• 10 centimeters

• 5 centimeters

• 3.5 centimeters

• 1 centimeter

What fraction of Earth's wobble is attributed to the melting of ice due to greenhouse gases?

• 3/4

• 1/2

• 1/4

• 1/3

How does mantle convection affect the Earth's spin?

• It has no effect on Earth's spin.

• It redistributes Earth's mass.

• It speeds up the Earth's rotation.

• It slows down the Earth's rotation.