Soil Formation and Composition

The texture of soil depends mainly on

• the types of plants that grow in the soil.

• the size of the particles in the soil.

• the color of the soil.

• the number of worms in the soil.

Tags

NGSS.MS-LS2-4

When you dig a deep hole in the ground, you might notice that the deeper soil looks different. Which statement best describes what you would see in Horizon C?

• Large and least weathered rock particles

• Topsoil

• Clay and minerals

• Organic material such as leaves and sticks

Why do tropical, desert, temperate, and arctic soils all have different characteristics?

• landforms

• climates

• horizons

• abrasions

Tags

NGSS.MS-ESS2-2

Which type of soil has the lowest permeability?

• gravel

• clay

• sand

• humus

The darker the soil the more...............it has

• sand

• clay

• water

• nutrients

A rock will weather more quickly in a hot, wet environment than in a cold, dry environment. This is an example of how...

• climate affects soil formation

• climate affects rock formation

• Landforms affect soil formation

• Landforms affect rock formation

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-1

A soil that has a high porosity would most likely contain:

• silt

• sand

• humus

• gravel/pebbles

By breaking down rocks with their roots, plants commonly cause what?

• chemical weathering

• mechanical weathering

• exfoliation

• abrasion

Which component of soil makes up about 45% of its composition?

• Air

• Water

• Minerals

• Organic Matter

Which component makes up approximately 5% of soil?

• Air

• Water

• Minerals

• Organic Matter