Quiz: Soil Cycles

What are the benefits of a healthy soil food web?

• plant protection against disease and pests
• water purification
• puts carbon into the ground)
• all of the above

How does bacteria help plants?

• Bacteria releases carbon to plants
• Bacteria provides energy (sugar) to plants
• Bacteria provides oxygen to plants
• None of the above

Exudates are:

• food distributed by roots to feed microbes in soils
• food distributed by microbes to feed roots in soils
• food distributed by roots to feed the plants above
• food distributed by microbes to protect roots

What do plants provide to bacteria?

• nutrients
• simple sugars and carbohydrates
• sunlight
• water

What do plants use to make food?

• N2 and O2
• nutrients and H2O
• nutrients, O2, sunlight
• sunlight, CO2, H2O

Which chemistry symbol represents the form of Nitrogen in the atmosphere?

• N2
• NO2-
• NH2
• NO3-

In the soil food web, what do fungi do?

• Make energy from Sunlight, water and H2O
• Provide energy to bacteria
• Decompose litter and organic material
• Provide energy to plants

What do protozoa provide to plants?

• O2
• CO2
• H2O
• nutrients in plant available forms

In the soil food web, what do nematodes do?

• provide energy to bacteria in root systems
• provide protection to plant root systems
• decompose litter and organic material
• none of the above

In the soil food web, what do burrowing animals do?

• they eat plant root systems
• they aerate and mix soils
• they decompose litter and organic material
• they provide water to soils