Chp. 9 Test Review Science BJU 4

The layer of soil that contains humus is called ___.

• clay
• bedrock
• topsoil
• subsoil

The layer in which most plants grow is called ___.

• subsoil

• bedrock

• water
• topsoil

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

• rockbed
• stonebase
• bedrock
• earthcore

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

• sediment
• boulders
• gravel
• pebbles

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

• shallower
• deeper
• wider
• cleaner

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

• sedimentation
• erosion
• weathering
• deposition

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

• erosion
• compaction
• weathering
• deposition

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

• estuary
• gulf
• delta
• lagoon

Soil is made of ___.

• water, humus, and fossils

• weathered rock, water, air, and humus

• weathered rock, air, and mesas

• rocks

Two types of landforms are ___.

• oceans and rivers
• plains and deserts
• forests and lakes
• mountains and dunes