What is soil? Science Unit

What is soil

• a rich mixture of the broken down remails of plants and animals

• a mixture of water, air, tiny pieces of rock and humus

• solid rock

• tiny paticles of rock that are smaller than silt

Tags

NGSS.MS-LS2-3

Why is soil important?

• a forest or garden

• there would be no food for people

• most plants need soil to grow

• soil is just dirt

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is humus and why is it important?

• bits of rock, helps keep the soil wet

• can be eaten and is a source of nutrition

• the first layer of soil, where plants grow

• a rich mixture of broken down remains of plants and animals that adds nutrients to the soil

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Soil can be... what colors?

• purple, pink

• yellow, blue

• green, orange

• black, red, brown, gray, or white

In this sentence: "Soil that is very good for plants is fertile."

What does fertile mean?

• bad for plants

• contains all the major nutrients

• smells bad

• changes the color of the soil

How many layer of soil are there?

• 4

• 5

• 3

• 6

The top layer of soil is called

• top soil

• bedrock

• subsoil

What grows in the topsoil?

• plants

• roots

• small pieces of rock

Subsoil...

• has no humus because it is solid rock

• has a lot of humus making the soil darker

• does not have a lot of humus, but it does have small pieces of rock

"If you dig deep enough into the soil, you will reach solid rock" called?

• topsoil

• subsoil

• bedrock

Tags

NGSS.MS-ESS1-4