End of unit: What happens at tectonic boundaries?

Which of the following describes the distribution of earthquakes and volcanoes? Select all that apply.

• In the centre of tectonic plates.

• At tectonic plate boundaries.

• Majority around the Atlantic Ring of Fire.

• Majority around the Pacific Ring of Fire.

• In linear belts.

Define a tectonic plate.

• a term used to describe sections of the Earth’s crust.

• A point at which two plates meet.

• The movement of the continents.

What are the layers of the Earth? Select all that apply.

• Inner core

• Mantle

• Magma

• Crust

• Outer core

What is the convection current theory for movement of tectonic plates?

• Core heats mantle, hot mantle rises over cooler which condenses.

• Plates are pulled into the mantle due to gravity in a process of subduction.

Answer explanation

The other answer is called slab pull!

Define subduction.

• The movement of two plates towards each other.

• The movement of two plates away from each other.

• The movement of one plate beneath another.

• The mvovement of two plates sliding past each other.

Select the names of the three main plate boundaries.

• Conservatve

• Constructive

• Complete

• Destructive

What happens at a destructive plate boundary?

• Denser plate forced under lighter in a process of subduction.

• Denser plate forced on top of lighter in a process of subduction.

• Two continental plates forced to slide past each other.

• Two oceanic plates forced to slide past each other.

What in an earthquake?

• When magma is forced to the surface through cracks and weaknesses in the crust.

• The build up of pressure as two plates sliding past each other get stuck, and the sudden release of tension.

Define the focus of an earthquake.

• The focus point above the ground on the earth's surface where the earthquake originates from.

• The centre point of the earthquake, underground.

• The point where the most effects occured during an earthquake.

Earthquakes are measured on the...

• Right Scale

• Richter Scale

• Explosivity Index