Soils, Weathering, Erosion, & Deposition Investigation 1 Assessment

What is humus?

• the largest particle that makes up soil
• the bottom layer of soil that makes up the earth's surface
• remains of decayed plants and animals that form the layer above topsoil

What is bedrock?

• remains of decayed plants and animals that form the layer above topsoil
• the bottom horizon of soil that makes up the earth's surface
• a hard bed of rock

What is a horizon?

• the breaking down of rock
• a layer of the soil
• remains of decayed plants and animals that form the layer above topsoil

Which type of soil is perfect for gardening or farming?

• clay
• sandy
• loam

Which soil type is described as "heavy" with close and tight particles?

• clay
• sandy
• loam

Which type of soil is rough to the touch and does not hold water well?

• clay
• sandy
• loam

The process of breaking down rock into smaller pieces is called....

• Weathering
• Erosion
• Deposition

What are the four main causes of weathering?

• water, wind, humans, and animals
• water, wind, ice, and plant roots
• water, sand, humans, and plants

What are sediments?

• bits of ice
• rocks, minerals, and the remains of dead plants and animals

• crushed rocks

The dropping of sediment by wind, water, ice, or gravity is known as....

• Weathering
• Erosion
• Deposition