Earth's Plates

The continental crust floats on top of the mantle because the crust is

• less dense than the mantle

• made of liquid material

• made of oxygen which is a light element

• separated by the mantle by a layer of water

The movement of crustal plates results from circulating currents in material beneath the crust of the Earth. Which best describes the material which moves the crustal plates?

• hot water

• molten rock

• liquid metal

• solid iron

The interaction of tectonic plate boundaries is associated with which of the following events?

• Hurricanes
• Tropical storms
• Earthquakes
• Tornadoes 

Oceans, and other bodies of water, are found on which layer of Earth?

• Outer core
• Mantle
• Inner core
• Crust

Earth’s layers are evidence that, over time, Earth has gradually -

• spun more quickly.
• grown in size.
• cooled into a solid.
• broken into parts.

Earth’s crust would be best modeled by using a material that is -

• liquid and hot.
• dense and smooth.
• soft and flexible.
• thin and solid.

What is the hottest layer of the Earth?

• inner core

• lithosphere

• crust

• mantle

What is formed where 2 CONTINENTAL PLATES COLLIDE?

• ocean basin

• earthquakes

• mountains

• volcano

What is formed where these plates are spreading apart?

• new ocean floor

• earthquakes

• volcanoes

• mountains

Events in which molten rock spews out from the mantle to the surface of Earth as ash, lava and gases; major geological events that occur when a dense plate subducts below a less dense plate

• Mountain Building

• Convergent boundary

• Divergent boundary

• Volcanic eruptions