Soil Review

Texture of soil depends on

• particle size

• color

• mass

• permeability

Which of these particles in soil has the most water retention?

• clay
• gravel
• silt
• sand

Some plants need to be in an environment where water drained easily. What type of soil would benefit these plants?

• sand
• shale
• clay
• silt

The best soil mixture for plant growth and drainage is:

• silt, pebbles, and clay
• sand, rocks, and clay
• humus, clay, and sand
• clay, silt, and rocks

What is the source of the organic matter needed for most fertile soils?

• moving water
• eroded sand
• decaying plants
• weathered bedrock

Tags

NGSS.MS-LS1-6

Which animal would best help the soil hold water?

• earthworms making tunnels under the surface
• cattle making depressions with their hooves
• horses making trenches when the gallop
• sheep pulling up plants by their roots

If soil is permeable, 

• water cannot flow through it.
• water easily flows through it
• it contains many minerals
• it contains few minerals

I am gray in color.  I am also very soft and powdery.  What am I?

• silt
• humus
• clay
• loam

I am red in color.  I am hard when dry but sticky when wet.  What am I?

• silt
• humus
• clay
• loam

I am black in color.  I am soft and crumbly  What am I?

• silt
• humus
• clay
• sand