Soil Review

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 correct order of soil particles in order of increasing particle size?

• clay-sand-silt
• sand-clay-silt
• silt-clay-sand
• clay-silt-sand

Which of these is NOT a function of soil?

• It is a habitat for plants, animals and bacteria

• It is a step in global nutrient cycles

• It is a place we grow plants

• It is always excellent at holding water

Soil texture directly relates to what:

• Proportion of mineral sizes

• Amount of minerals

• Amount of nutrients

• Proportion of bacteria and fungi

Which soil particle is the loargest?

• Sand

• Silt

• Clay

• Rock

which soil particle is the smallest?

• Sand

• Silt

• Clay

• Rock

What are the different layers of soil in the earth called?

• Soil horizons

• Soil layers

• Soil strata

• Soil changes

The soil horizons together make up the soil _____________.

• Strata

• Pedigree

• Parallel

• Profile

What is the process by which rock is broken down into smaller particles by exposure to the elements?

• Weathering

• Erosion

• Profiling

• Deconstructtion

What Layer of the soil profile supports most of the plant and animal life on earth?

• O horizon

• A horizon

• B horizon

• C horizon