6th Grade Chapter 4 Test Review

A dark colored substance that forms when plant and animal remains decay

• loam

• humus

• bedrock

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A mixture of rock particles, minerals, decayed organism material and water and air.

• Soil

• Decomposers

• Beckrock

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

The process of wearing down and CARRYING away rock

• Weathering

• Erosion

The material is full of tiny, connected air spaces that allow water to seep through it.

• Permeable

• Weatherin

• Erosion

• Solid

Tags

NGSS.MS-ESS2-1

The process that breaks down rock and other substances

• Weathering

• Erosion

Organisms that break down the remains of dead organisms

• Producers

• Consumers

• Decomposers

Tags

NGSS.MS-LS2-3

The process that splits rock through freezing and thawing is called

• abrasion

• dissolving

• erosion

• frost wedging

Soil that is made up of roughly equal parts of clay, sand, and silt is called

• loam

• sod

• topsoil

• subsoil

Which technique returns nutrients to soil?

• Chemical weathering

• contour plowing

• crop rotation

• wind erosion

What is the MOST important role that burrowing animals play in the formation of soil?

• Breaking down organic materials

• Decomposing dead animals

• Holding soil in place

• Mixing air and water into the soil