Year 9 Science - Earth and Space Sciences - Plate tectonics

This is a map of the Great Global Rift System. Which statement about it is INCORRECT?

• It is where seafloor spreading occurs.

• It is where plates converge.

• It is where plates diverge.

• It is where new oceanic crust is being formed.

What was used as evidence for seafloor spreading? Select all correct answers.

• The age of the sea floor.

• Sediment thickness.

• Magnetic striping.

• Underwater volcanoes.

The direction of the magnetic field in the rocks is not always the same.

True or false?

• TRUE

• FALSE

Study the image and information next to it. Did the magnetic field point north or south when the green stripe was formed?

• North

• South

True or false: The rocks in the oceanic crust are usually younger than the rocks in the continental crust.

• True

• False

Study the diagram. What do you find at locations where the continental and oceanic crust collide?

• Friction

• Mid-ocean ridge

• Subduction zone

• Rising magma

Study the diagram. What do you find at locations where oceanic plates move away from each other?

• Friction

• Mid-ocean ridge

• Subduction zone

• Rising magma

Study the diagram. What force makes the plates move?

• Friction

• Mid-ocean ridge

• Subduction zone

• Rising magma

Study the diagram. What is responsible for the convection currents?

• Friction

• Mid-ocean ridge

• Subduction zone

• Rising magma

At which type of boundary are you most likely going to find volcanoes?

• Diverging

• Converging

• Transform