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Earth's Core and Magnetic Field

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Questions and Answers

What is the main cause of plate movement?

The convection of liquid metals in the outer core

The movement of the Earth's mantle

The convection currents in the Earth's mantle (correct)

The movement of the Earth's inner core

What is the composition of the inner core?

Solid rocks

Liquid metals such as iron and nickel

Partially melted rock

Solid iron and nickel (correct)

What is the temperature of the inner core?

Up to 10,000°C

Up to 15,000°C

Up to 5,500°C (correct)

Up to 2,000°C

What is the result of the plates moving at their boundaries?

The creation of earthquakes and volcanoes Signup and view all the answers

What is the layer of rock beneath the Earth's plates?

Partially melted rock Signup and view all the answers

What is the role of the inner core in the Earth's system?

It is the engine room of the Earth Signup and view all the answers

What is the average thickness of the Earth's crust?

22 miles Signup and view all the answers

What is the primary cause of earthquakes and volcanoes?

The movement of the tectonic plates Signup and view all the answers

What is the main composition of the outer core?

Iron and nickel Signup and view all the answers

What is the result of the movement of the tectonic plates over a long period of time?

The formation of mountains Signup and view all the answers

What is the layer of the Earth where the tectonic plates float?

The mantle Signup and view all the answers

What is the percentage of the Earth's mass that the outer core makes up?

30% Signup and view all the answers

What happens when the edge of one plate slides under another plate?

One plate is destroyed Signup and view all the answers

What is the result when the stress on the edge of a plate overcomes the friction?

An earthquake that releases energy in waves Signup and view all the answers

What is formed when magma cools and hardens on the Earth's surface?

A pile of rock Signup and view all the answers

What is the main reason why most volcanoes are located along tectonic plate boundaries?

Because one tectonic plate will slide and move under another one Signup and view all the answers

What is the process by which the melted rock beneath the plates rises up to form new crust?

Magma rising up to form new crust Signup and view all the answers

What is the term for the rock that is melted due to the high temperatures at the Earth's core?

Magma Signup and view all the answers