Plant Energy and Nutrient Acquisition Quiz

From where do plants obtain carbon dioxide?

• From the soil

• From the air

• From water

• From sunlight

Which of the following is a source of energy for plants?

• Soil nutrients

• Sunlight

• Water

• Air

Which of the following is essential for photosynthesis in plants?

• Nitrogen

• Sunlight

• Potassium

• Phosphorous

Which component of soil is responsible for holding water?

• Humus

• Air

• Living organisms

• Plastic

What is the primary function of water in soil?

• To dissolve nutrients

• To provide structure

• To increase temperature

• To repel insects

Which type of weathering is more likely to occur in a humid environment?

• Mechanical weathering

• Chemical weathering

• Biological weathering

• Thermal weathering

What happens to rocks during mechanical weathering?

• They dissolve.

• They change color.

• They break into smaller pieces.

• They form new minerals.

What is found in the B Horizon of soil?

• Organic matter

• Bedrock

• Tiny rock particles

• Decomposing plant matter

What type of material is found in the A Horizon?

• Bedrock

• Organic matter mixed with weathered rock particles

• Parent material

• Tiny rock particles

Which horizon is the deepest and consists of solid rock?

• O Horizon

• A Horizon

• R Horizon

• B Horizon