A plant's roots grew into the rock and broke it.

Sand blew against the rock to change its shape.

Animals dug a large hole through the rock.

Fire burned through the rock and made a hole.

Roots protect the soil from being washed away.

Branches make shade to help keep soil cool.

Roots grow through rocks and change their shape.

Leaves help to shelter insects that live in the soil.

wind and water

light and sound

lakes and rivers

soil and rocks

a rocky, flat area at the bottom of an ocean

a large body of ice that moves very slowly

a plain that is grassy and has very few trees

an area that is very hot and gets little rain

glaciers

deserts

mountains

canyons

sound

water

animals

paint

They warm up the area so that plants and animals can live.

They move very quickly and break everything in their path.

They can wear away mountains and leave behind valleys.

They stop erosion of land by blocking rivers and streams.

Water and wind carry away rocks and soil.

Rocks crack and break into smaller pieces.

Bodies of ice travel slowly across land.

Animals move to warm places for the winter.

Flood the area with water to protect the soil and crops.

Plant tall trees around the crops to protect them from wind.

Build a large river that flows through the farmland.

Plant the crops underground to help stop erosion of the soil.

The limestone changes and becomes softer.

The crack gets bigger to form an opening.

Rain and snow carry away bits of limestone.

Water runs through a crack in the limestone.

a type of wind that blows trees over

when a river overflows

a giant earth quake

dirt, soil, and sand are carried away to another location