Soil Composition and Characteristics Quiz

What is the primary component that soil rests upon?

• Silt

• Bedrock

• Sand

• Clay

Which of the following is NOT a component of ideal soil?

• Liquid water

• Weathered rocks and minerals

• Organic matter

• Plastic particles

What is the largest particle size found in soil?

• Sand

• Silt

• Gravel

• Clay

What is the smallest particle size found in soil?

• Sand

• Clay

• Silt

• Gravel

Which process breaks down organic matter into simpler substances?

• Decomposition

• Erosion

• Evaporation

• Sedimentation

Which of the following is considered inorganic matter?

• Water

• Leaves

• Caterpillar

• Grass

Which group of organisms is known as nature's recyclers?

• Producers

• Carnivores

• Decomposers

• Herbivores

Which of the following is NOT a function of decomposers?

• Producing oxygen

• Breaking down dead animals

• Recycling nutrients

• Breaking down dead plants

What is the role of humus in soil?

• To compact the soil

• To create pores for air and water

• To repel insects

• To increase soil temperature

What is the top layer of soil primarily composed of?

• Water

• Organic material

• Inorganic minerals

• Air