Y9 6.5 Tectonics [ReviSion]

What causes the tectonic plates to move?

• convection current of magma

• the earth's magnetic field
• the earth spinning
• earth's gravitational pull

Scientists think that the movement of Earth's tectonic plates are caused by convection currents, that are located in the _________?

• outer core
• inner core
• mantle

Which set of events is most common along tectonic plate boundaries?

• Earthquakes and volcanoes

• Erosion and earthquakes

• Tidal waves and volcanoes

• Hurricanes and tsunamis

Earth's crust is broken up into several large rocky pieces called ...

• tectonic plates

• faults
• fossils
• puzzle pieces

Convection currents happen in the mantle. The outer core heats magma around it and causes it to become less dense. Because the magma is less dense than the material around it, it starts to rise toward the crust. Since the crust is not hot, the magma starts to cool as it gets close to the crust. Since it is cooling, it gets denser and starts to sink back down toward the outer core.

Use the information above to answer the following question: Which of the following TWO things happen to magma causing it to rise?

• It gets cooler.

• It gets warmer.

• It gets denser.

• It gets less dense.

What is the thinnest and outer most layer of the Earth, that we live on?

• Outer Core

• Crust

• Mantle

• Inner core

Which layer of the Earth is solid iron and nickel?

• Mantle

• Crust

• Inner Core

• Outer core

Describe the most likely relationship between these mountains and nearby tectonic plates.

• The mountains are probably formed by earthquakes

• The mountains are probably formed by the movement of glaciers

• The mountains are probably located near the edge of 2 tectonic plates.

• The mountains are probably formed by running water.

What was the name given to all the continents when they were joined as one super continent?

• Supreme Continent

• Eurasia

• Plate tectonics

• Pangaea

Earth's plates are....

• Constantly moving and changing the face of the Earth
• Never moved
• Move seldom and very fast
• move when they feel like it