Soil

What is humus?

• The decayed remains of plants and animals.
• The loose material that covers much of Earth's surface.
• Something you eat! 

Tags

NGSS.5-LS2-1

Which layer of soil do plants usually grow in?

• topsoil
• subsoil
• bedrock

What type of soil is made from a mixture of sand, silt, and clay?

• sand
• silt
• clay
• loam

Soils can be all different colors.

• True
• False

When soil is being formed, the first step is: 

• weathering of rock
• mixing with humus
• mixing with air and water

Tags

NGSS.4-ESS2-1

Soil takes many ________ to form.

• days
• months
• years

Tags

NGSS.MS-LS2-3

Soil formation is considered a _________________ change to Earth's surface.

• fast 
• slow
• no

This type of soil is usually red in color and is very sticky when it's wet. 

• sand
• clay
• silt
• loam

This type of soil is made of larger pieces of rock and doesn't hold water well. 

• loam
• clay
• silt
• sand

Why are nutrients good in the soil?

• they help the plants grow healthy
• they provide a place for the roots to grow
• they soak in all the water