Components of the Soil

.......................... is the decayed remains of animals and plants.

• Humus

• Silt

• Sand

• Clay

Soil is important for plant as ................. .

• it provides it with nutrients and minerals

• it represent the home of some animals

• some animals depend on plants in feeding

• none of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Soil erosion occurs due to ...................... .

• water rushing

• winds

• change of temperature

• all of the above

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-1

The loose upper layer that covers the Earth's crust is called ....................... .

• humus

• soil

• silt

• gravel

........................ adds nutrients to the soil.

• Humus

• Sand

• Clay

• Silt

Tags

NGSS.MS-LS2-1

The soil is composed of ........................ .

• top soil layers only

• lower soil layers only

• rocky layers only

• all of the above

The main benefits of soil organisms are .............................. .

• digging tunnels that allow air and water to pass easily

• helping the soil to be cohesive (compact)

• forming humus

• first and third choices are correct

All the following are benefits of roots of plants to soil except ......................... .

• preventing the soil erosion

• adding nutrients to the soil

• fixing plats in soil

• digging tunnels

....................... are the soil layers that lie beneath the top soil layers.

• Top soil layers

• Lower soil layers

• Rocky layers

• Earthworms

.................... dig tunnels in the soil to make nests.

• Earthworms

• Some spiders

• Ants and other insects

• All of the above