OCR Geology Surface Processes

The in situ alteration / breakdown of rocks by exposure to the atmosphere, water and organic matter.

• Erosion

• Weathering

• Transport

• Deposition

Caused by the expansion of freezing water in fractures which forces rocks apart.

• Exfoliation

• Carbonation

• Hydration

• Frost-shattering (freeze-thaw)

The wearing away of the Earth’s surface by the action of wind, water or ice dragging sediment over or hurling it at a surface.

• Abrasion

• Attrition

• Weathering

• Deposition

The transport of material in water or air, without it touching the Earth’s surface.

• Traction

• Saltation

• Suspension

• Solution

The transport of material by bouncing.

• Traction

• Saltation

• Suspension

• Solution

The expansion and fracturing of rock due to the removal of overlying rocks.

• Abrasion

• Frost-shattering (freeze-thaw)

• Carbonation

• Pressure release

The reaction between carbonic acid and minerals.

• Abrasion

• Hydration

• Carbonation

• Exfoliation

Also known as 'onion-skin' weathering?

• Hydration

• Exfoliation

• Carbonation

• Saltation

Odd one out?

• Well-sorted

• Well-rounded

• Angular

• Sub-rounded

This image shows a...?

• Well-sorted sediment

• Moderately-sorted sediment

• Poorly-sorted sediment