6th grade Unit 8 Test

The breaking down of rocks into smaller fragments.

• weathering

• erosion

• deposition

• gravity

The removal of rock from one location and transporting to another.

• weathering

• erosion

• deposition

• gravity

When sediment that has eroded is dropped in a new location.

• weathering

• Erosion

• Deposition

• Gravity

Temperature changes, pressure changes, plant and animal actions, water, wind, and gravity are agents of _____________weathering.

• Chemical

• Physical

• Mountain

The breaking down and wearing away of rock material by the mechanical action of other rock.

• oxidation

• abrasion

• Chemical Weathering

• Erosion

Agents of __________ weathering include oxygen in the air and acids.

• Chemical

• Physical

• oxidation

• abrasion

The process by which other chemicals combine with oxygen is called __________.

• abrasion

• erosion

• oxidation

When fossil fuels are burned, other chemicals combine with water in the atmosphere to produce even stronger acids. When those acids fall to Earth, they are called ______________________.

• oxidation

• floodplain

• acid precipitation

• Delta

When a stream floods, a layer of sediment is deposited over the flooded land. Many layers of deposited sediment can form a flat area called _________.

• floodplain

• alluvial fan

• delta

• shoreline

When a stream empties into a body of water, such as a lake or an ocean, the current slows and it deposits its load. Streams often deposit in a fan-shaped pattern called a _______.

• floodplain

• alluvial fan

• delta

• coastline