Envirothon Team Soils

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

• 1 mm

• 2 mm

• 3 mm

• 4 mm

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

• 9%

• 12%

• 18%

• 21%

The breakdown of rock into smaller pieces by physical means; common causes are ice, wind, water, gravity, plants, and animals

• Physical (Mechanical) Weathering 
• Chemical Weathering

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

If you have yellow or red soil, it is an indication of ______________ in your soil

• calcium
• water
• iron oxides
• sand

Low AWHC is less than ___________ inches.

• 2

• 4

• 6

• 8

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-1

When figuring AWHS fine texture is _________ AWHC/Inches/inch.

• .05

• .20

• .15