soil quiz

The MAIN  thing Decomposers do for the the soil is the following:

• Store moisture
• Burrow deep in the soil
• Make space for air and water
• Break down and digest dead organisms

The two main factors that determine the rate of weathering are the TYPE of rock and_____.

• Music
• Climate
• Size of rock
• Weight of rock

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

_______ is the type of soil used most often with plants and on farms. It is a mixture of clay, sand, and silt.

• loam
• humus
• soil
• dirt

Which type of soil can hold the greatest amount of water?

• sand
• silt
• clay
• loam

Many plants cannot grow in sandy soil. Why is this true?

• Sandy soil does not hold enough water.
• Air cannot pass through sandy soil.
• Roots cannot easily push through sandy soil.
• Sandy soil has too many nutrients.

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Which of the following is the largest particle in soil?

• sand
• silt
• humus
• clay

Porosity refers to...

• the shape of the particles
• The sorting of the particles
• % of pore space in a material
• % of cement in a material

Impermeable materials...

• have an abundance of pores.
• let water in.
• have little to no pores.