Weathering and Soil

________________is the dropping of sediment by wind, water, ice, or gravity.

• erosion
• deposition
• delta

_______________is the unweathered rock that lies below the subsoil.

• bedrock
• topsoil
• subsoil

____________is the layer of soil just below the topsoil.

• bedrock
• topsoil
• subsoil

___________is the slow breaking apart or wearing away of rock into smaller pieces.

• erosion
• weathering
• deposition

___________is a large mass of deposited sediment at the mouth of a river.

• delta
• humas
• estuary

_____________is the uppermost layer of soil.

• topsoil
• subsoil
• bedrock

____________is the decayed remains of plants and animals.

• soil
• weathering
• humus

_____________is the movement of weathered rock material from one place to another.

• weathering
• erosion
• deposition

________________ is the loose material that covers most of the Earth's surface.

• soil
• bedrock
• humus

________________ is a large mass of slow-moving ice that flows down a slope.

• delta
• deposition
• glacier