Inner Core

The inner core is how many miles in Diameter?

• 151 miles

• 1516 miles

• 1600 miles

• 161 miles

How hot is the Earth's inner core?

• 5000 to 9000 degrees F

• 9000 degrees F

• 9000 to 11000 degrees F

• 9000 to 13000 degrees F

Where do the high temperatures of the Earth's inner core come from?

• From the leftover heat of Earth's formation, gravity and radioactive decay.

• From the gravitational forces around Earth and the Sun.

• From the Sun and the moon.

• From the leftover heat of Earth's formation, the moon's gravity field and the Sun.

The Earth's core is a solid ball of metal.

• True

• False

What elements are in the Inner Core?

• Gold, Nickel, Aluminum, Silicon and others

• Silver, Iron, Magnesium, Oxygen and others

• Iron, Nickel, Sulfur, Oxygen and others

• Iron, Gold, Sulfur, Nitrogen and others

Even though the inner core is very hot, the elements do not _________________ , and remain in a ________________ state.

• freeze, solid

• melt, liquid

• crumble, solid

• melt, solid

Why does the inner core remain solid?

• Because of the Earth's gravitational field.

• Because of the pressure/weight coming from the other layers.

• Because the radioactive material in the core.

• Because of the elements in the three other layers.

What did the people at Columbia University discover?

• The Inner Core may move slightly faster than the rest of the planet.

• The Inner Core has its own gravitational field.

• The inner core may move slightly slower than the rest of the planet.

• The inner core has more elements in it than the other layers.