Earth's Surface

What is soil made of?

• humus

• minerals

• pieces of rocks

• all of the above

All soil is the same size, color, and shape.

• True

• False

Weathering by wind, water, or ice produces ________________.

• erosion
• glaciers
• sediment
• soil

______________ is the process of rock breaking apart by water, wind, or ice.

• weathering
• erosion
• deposition
• natural resources

A river slowly erodes a steep hill, which causes sediment to travel downstream and eventually drop in a process called _____________.

• weathering
• erosion
• conservation
• deposition

This horizon has the largest sediments and consists of solid rock.

• topsoil

• subsoil

• lowest layer

• bedrock

The soil level that contains humus is ___________.

• subsoil

• bedrock

• lowest layer

• topsoil

lightweight and soft texture

• subsoil

• bedrock

• lowest layer

• topsoil

less organic material; contains weathered rock and clay

• subsoil

• bedrock

• lowest layer

• topsoil

The substance that is melted rock below the ground is called what?

• Magma

• Sediment

• Gas

• Water