Ocean Currents

plate tectonics earthquakes ad volcanoes

Multiple Choice

What is the top layer of the Earth called?

• Mantle

• Crust

• Inner core

• Outer core

Multiple Choice

What is the mantle made out of?

• Solid rock

• Solid heavy metals

• Soft molten rock

• Liquid Nickel & Iron

Open Ended

What evidence is there to support Alfred Wegener's theory of Pangea? (3 pieces)

Open Ended

What causes continental drift?

Open Ended

What are plate boundaries?

Open Ended

Name 3 features of a plate boundary

Multiple Choice

What happens at a constructive plate boundary?

• 2 plates move apart because of convection currents

• 2 plates of similar density move together

Multiple Choice

What is a destructive plate boundary?

• 2 plates of similar density move together

• Where the oceanic plate meets the continental plate

Open Ended

What happens at a collision plate boundary?

Open Ended

What happens at a conservative plate boundary?

Open Ended

What is a volcano?

Multiple Choice

Which type of volcano is unlikely to erupt again

• Dormant

• Extinct

• Active

Multiple Choice

Which type of volcano is said to be sleeping?

• Active

• Extinct

• Dormant

Open Ended

Which are the 3 areas volcanos can be found?

Open Ended

What are hots spots and where do they occur?

Open Ended

Explain how volcanos form at destructive plate boundaries

Open Ended

Why do you think most volcanic eruptions happen in the Pacific 'Ring of Fire'?

Open Ended

List 3 reasons why people would live in the vicinity of a volcano

Open Ended

Give 2 warning signs of possible volcanic eruption

Open Ended

Give 2 ways of monitoring volcanic activity

Causes of earthquakes

• An earthquake is the shaking and vibration of the Earth's crust due to movement of the Earth's plates (plate tectonics).

  Most earthquakes will happen along any type of plate boundary.

  Big earthquakes usually only occur at these plate boundaries.

  There is an "earthquake belt" around the world where plate activity gives rise to eathquakes.

Epicentre and Focus

• The point inside the crust where the pressure is released is called the focus.

  The point on the Earth's surface above the focus is called the epicentre.

  Earthquake energy is released in seismic waves. These waves spread out from the focus.

  The waves are felt most strongly at the epicentre, becoming less strong as they travel further away.

  The most severe damage caused by an earthquake will happen close to the epicentre.

Open Ended

What causes and Earthquake?

Open Ended

What factors effect the ability of a country to respond to and Earthquake?

Open Ended

Explain the word Focus

Open Ended

What is the epicentre?

Open Ended

What are the abilities/availability of resources of LEDC countries when responding to an earthquake?