Lewis Landforms lessons 5-8

Front

What is physical weathering?

Back

Physical weathering is the process of breaking down rocks into smaller pieces without changing their chemical composition. An example is frost wedging, where water freezes in cracks of rocks and expands, causing the rock to split.

Front

What is chemical weathering?

Back

Chemical weathering is the process that changes the chemical composition of rocks. An example is acid rain wearing away limestone.

Front

What is erosion?

Back

Erosion is the process of moving sediment from one location to another, often caused by wind, water, or ice.

Front

What is deposition?

Back

Deposition is the process of dropping sediment in a new location after it has been transported by erosion.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. For example, sand mixed with sugar-water.

Front

How can sand be separated from a sugar-water solution?

Back

Sand can be separated from a sugar-water solution because it does not dissolve in water and can settle at the bottom.

Front

What is the role of glaciers in deposition?

Back

Glaciers can deposit rocks and sediment in new locations, such as oceans and lakes, as they melt.

Front

What is frost wedging?

Back

Frost wedging is a type of physical weathering where water seeps into cracks in rocks, freezes, and expands, causing the rock to break apart.

Front

What is oxidation in weathering?

Back

Oxidation is a chemical weathering process where oxygen reacts with minerals in rocks, often leading to rusting.

Front

What is the difference between weathering and erosion?

Back

Weathering is the breaking down of rocks, while erosion is the movement of those broken pieces to a new location.