Benchmark Review

Convection currents in the _____________move the tectonic plates.

• crust

• mantle

• inner core

• outer core

The ______________ is composed of liquid rock composed of iron and nickel.

• crust

• mantle

• inner core

• outer core

Which layer is made of molten rock?

• crust

• mantle

• outer core

• inner core

As tectonic plates move, what landforms could occur?

• sand dunes

• deltas

• caves

• mountains

Harry Hess discovered _______________________________.

• sea floor spreading

• subduction

• convection currents

• ocean trenches

Rock is ________________ closer to the crack at a divergent boundary.

• older

• younger

Which rock group forms from the cooling and hardening of magma?

• igneous

• metamorphic

• sedimentary

Which type of rock weathers to form sediment?

• igenous

• sedimentary

• metamorphic

• all rocks can weather to form sediment

Which type of rock is formed under heat and pressure?

• igneous

• metamorphic

• sedimentary

If you clear cut a section of the forest and a large rainstorm follows, what may happen to the area?

• the soil will soak up more nutrients for the plants

• too much carbon dioxide will build up

• the top layer of soil will erode away