Envirothon Soil

Which rock particles will remain suspended in water for the longest time?

• pebbles

• silt

• clay

• sand

Tags

NGSS.MS-ESS2-4

Which layer of soil are these roots growing in?

• subsoil

• topsoil

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand

• silt

• clay

• humus

Tags

NGSS.MS-LS2-3

Soil is made of

• weathered rocks and minerals

• dead plants and animals

• air and water

• all of the above

Tags

NGSS.MS-LS2-3

Any particle larger than ____________ is not considered soil but is called rock.

• mm

• 2 mm

• 3 mm

• 4 mm

Organic material makes up between 0 and ____ of most soils.

• 9%

• 12%

• 18%

• 21%

Which of the following is NOT a major soil forming factor?

• Time, Topography

• Climate, Parent Material

• Organics (organisms)

• Deposition

Which of the following is the largest particle in soil?

• sand

• silt

• humus

• clay

Which ones does not represent soil texture:

• Silt

• Clay

• Humus

• Sand

Which soil particles have the largest pore spaces between sediments?

• Clay

• Silt

• Sand