Weathering and Erosion Processes

Front

Mountains start as solid rock.

Back

Mountains begin as solid rock but break into smaller pieces over time.

Front

Rock breaks into smaller pieces.

Back

Rocks break into smaller pieces and roll down the mountain.

Front

Rocks do not last forever.

Back

Rocks eventually break down and do not last forever.

Front

Weathering process.

Back

Weathering involves root-wedging and ice-wedging.

Front

Ice thaws and contracts.

Back

Ice thaws, contracts, and water seeps deeper into cracks.

Front

Repeated expansion and contraction.

Back

This process causes further cracks until the rock breaks apart.

Front

Cracks widen with freezing water.

Back

As water freezes, cracks get wider and rocks break.

Front

Weathering vs. Erosion

Back

Weathering is the process of breaking large rocks into smaller rocks over time, while erosion is the movement of weathered rock and soil from one place to another.

Front

Difference in rocks on a mountain

Back

Rocks on a mountain are different at the top and bottom.

Front

Characteristics of rocks at the top of mountains

Back

Rocks at the tops of mountains are jagged.