Geo 1

Question 1

How do convection currents work?

Answer 1

1.The tectonic plates float on the mantle. Radioactive decay of some elements in the mantle and core, e.g uranium, generates a lot of heat. When lower parts of the asthenosphere heat up, they become less dense and rise.
2. As they move towards the top of the mantle they cool down, become more dense, then slowly sink.
3. T

Question 1

How do convection currents work?

Answer 1

1.The tectonic plates float on the mantle. Radioactive decay of some elements in the mantle and core, e.g uranium, generates a lot of heat. When lower parts of the asthenosphere heat up, they become less dense and rise.
2. As they move towards the top of the mantle they cool down, become more dense, then slowly sink.
3. These circular movements are called convection currents.

Question 2

What are plate margins?

Answer 2

Plate margins are the places where plates meet.

Question 3

How can earthquakes occur at destructive plate margins?

Answer 3

They can occur at destructive plate margins when tension builds up when one plate gets stuck as it’s moving down past the other mantle.

Question 4

How can earthquakes occur at constructive plate margins?

Answer 4

Earthquakes can occur at constructive plate margins when tension builds along the cracks within the plates as they move away from each other.

Question 5

How can earthquakes occur in collision margins?

Answer 5

Earthquakes occur in collision margins when tension builds up as the plates are pushed together.