WEATHERING

What is weathering?

• A type of earthquake

• A process that creates mountains

• A process that changes the characteristics of rocks

• A type of volcanic eruption

What is mechanical weathering?

• A process of melting rocks

• A process of breaking down rocks without changing composition

• A process of changing the chemical composition of rocks

• A process of creating new rocks

What causes mechanical weathering?

• Plant growth, animal movements, human construction

• Pressure, temperature, abrasion, frost wedging, human activities

• Rain, sunshine, wind, snow

• Volcanic eruptions, earthquakes, tornadoes

What is thermal loading?

• Changes in humidity causing rocks to dissolve

• Changes in temperature causing rocks to expand and contract

• Changes in pressure causing rocks to break

• Changes in wind speed causing rocks to erode

What is wetting and drying in weathering?

• A process that disintegrates rocks, especially those containing clay

• A process that heats rocks

• A process that freezes rocks

• A process that pushes rocks together

What is crystallization in weathering?

• A process where rocks are compressed by air pressure

• A process where saltwater penetrates rocks resulting in decay

• A process where rocks are melted by heat

• A process where rocks are broken by wind

What is chemical weathering?

• Changes in the color of rocks due to sunlight

• Changes in the shape of rocks due to erosion

• Changes in the size of rocks due to physical forces

• Changes in the composition of rocks due to chemical reactions

What causes chemical weathering?

• Dissolution, hydrolysis, oxidation

• Rain, wind, ice

• Plant growth, animal movements

• Pressure, temperature, abrasion

What is biological weathering?

• Weathering caused by human activities

• Weathering caused by movements of plants and animals

• Weathering caused by volcanic eruptions

• Weathering caused by earthquakes

What is denudation?

• A process of breaking down rocks into smaller pieces

• Geological processes where moving water, ice, wind, and waves erode the Earth's surface

• A process of transporting sediments from one place to another

• A process of depositing rocks in a new location