Earth Science

The ------------ is a solid ball of iron.

• crust

• mantle

• outer core

• inner core

The ----------layer is the thickest layer of Earth.

• crust

• mantle

• outer core

• inner core

The ----------- is made of molten lava which is mostly iron and nickel

• crust

• mantle

• outer core

• inner core

The ------- is made of 3 layers. The outside layers are solid and the inner layer is molten rock.

• crust

• mantle

• outer core

• inner core

The breaking down or wearing away of rock is.........

• erosion

• vents

• weathering

• faults

Weathering is a ...........process.

• fast

• temporary

• immediate

• slow

The Earth's crust is broken into pieces called.............

• plates

• vaults

• vents

• debris

An earthquake occurs when plates move..........

• gradually

• slowly

• suddenly

• overnight

Mountains may form when plates.......

• collide

• push apart

• slide

A ........ is an opening in a volcano though which lava flows./

• magma

• vent

• chamber

• lava flow