Soil and Sediment Quiz

The layer of soil that contains humus is called ____.

• bedrock

• topsoil

• subsoil

The layer in which most plants grow is called ____.

• gravel

• bedrock

• clay

• topsoil

• subsoil

The layer that is made of solid, unweathered rock under layers of soil is called ____.

• topsoil

• gravel

• subsoil

• clay

• bedrock

Small bits of weathered rock and other material are called ____.

• dust

• gravel

• humus

• abrasion

• sediment

Sediment that is deposited at the mouth of a river makes the mouth of the river ____.

• narrower

• deeper

• cleaner

• shallower

• wider

The moving of bits of weathered material from one place to another is called ____.

• erosion

• deposition

• gravity

• sediment

• transportation

The dropping of sediment in a new place is called ____.

• erosion

• landforms

• weathering

• abrasion

• deposition

An area of sediment that builds up at the mouth of a river is called ____.

• a delta

• a butte

• an avalanche

• a plateau

• a canyon

Soil is made of ____.

• water, humus, and fossils

• weathered rock, air, and mesas

• weathered rock, water, air, and humus

Two types of landforms are ____.

• mountains and dunes

• gorges and rivers

• dunes and lakes