Earth Systems: Layers of the Earth & Plate Tectonics

The outermost layer of the Earth is called the

• crust

• mantle

• outer core

• inner core

The _________ crust is thicker, but less denser than the _________ crust.

• continental, oceanic

• oceanic, continental

• convection, upper

• lower, upper

The earth has a solid, ___________ that is surrounded by a liquid, _____________.

• inner core, outer core

• outer core, inner core

• inner core, mantle

• outer core, crust

As the Earth rotates, the outer core circulates around the inner core which causes a ____________ to form.

• dynamo effect

• polar field

• reverse effect

• field

The ________ is the convective layer (convection currents occur here).

• mantle

• crust

• core

• lower mantle

The Earth is primarily composed of _______.

• rock

• gas

• water

• land

What percent of the Earth's surface is covered by a relatively thin later of water?

• 75

• 85

• 50

• 25

The entire planet is surrounded by a thin layer of gas we call the ___________.

• atmosphere

• lithosphere

• asthenosphere

• ozone layer

Rising heat from the center of the Earth causes tectonic plates to move around. These plates can collide, spread apart, or slide past one another. Which is not a result of these movements?

• typhoon

• mountains

• volcanoes

• earthquakes

German Scientist ____________ proposed the hypothesis of ____________.

• Alfred Wegener, Continental Drift

• Alfred Wegener, Plate Tectonics

• Harry Hess, Continental Drift

• Harry Hess, Plate Tectonics