3rd Grade Soil Review

This is made of very, very small rocks and has NO nutrients. When dry it cracks and when wet it is SLIMY!

• silt

• rock

• clay

• sand

This is larger than clay but smaller than sand. Erodes easily. Lots of nutrients. Slimy when wet.

• silt

• humus

• clay

• sand

The loose upper layer of the Earth's surface where plants grow.

• sand

• humus

• silt

• soil

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Which particle sizes are in order from largest to smallest?

• clay, silt, sand, gravel

• gravel, sand, silt, clay

• clay, gravel, silt, sand

• gravel, clay, silt, sand

The slow breaking apart or wearing away of rock into smaller pieces

• erosion
• weathering
• deposition
• delta

When soil is being formed, the first step is: 

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

This is a type of soil.

• sand
• silt
• clay
• all of the above

In this soil, plants may drown if roots don't get the air they need.

• sand
• silt
• clay

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

Which of the following relies on soil for survival?

• plants

• animals

• humus

• all of the above

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-3

Which layer is topsoil?

• Closest layer to the ground we walk on

• Middle layer with one above it and one below it

• Deepest layer in the Earth

Tags

NGSS.MS-ESS2-1