Erosion M5 L2

Forces within Earth _______ the crust into mountains, plateaus, and other  landforms. At the same time, processes such as weathering ________ the  crust.

• build up

  break down

• break down

  build up

Rocks can change size and shape without changing their ______ properties.

• chemical

• physical

• manual

Ice, wind, water, gravity, plants and animals cause ________ weathering.

• chemical

• physical

• manual

Animals can ______ in the ground; this may loosen and break apart rocks in  the soil as they move

• build up

• sleep

• burrow

 roots enter cracks in rocks; as they grow the rocks are cracked ______ 

•  apart 

• into many pieces

• closed

small ________ may even pry apart cracked rocks

• rocks

• pets

• plants

water can seep into cracks in a rock during warm weather; the water  freezes during ______ weather

• rainy

• cold

• hot

the water _______ and makes the crack bigger

• expands

• shrinks

• washes away

freezing and thawing is a process called frost _______;

may also widen cracks in        

            sidewalks and causes potholes in streets

• meltting

• sinking

• wedging

________ - the action of rocks and sediments grinding against each other   and wearing away surfaces 

• weathering

• abrasion

• freezing