Environmental Cycling

Bacteria are important in the nitrogen cycle because they __________________________.

• produce sugars that plants can use

• decay and eventually form fossil fuels

• respire, returning carbon dioxide into the atomosphere

• help convert nitrogen into a form that organisms can use

Fossil Fuels are part of which of these cycles? 

• carbon

• oxygen

• nitrogen

• phosphorus

Describe the nitrogen cycle?

• Nitrogen fixing bacteria in soil change Nitrogen into nitrogen compounds

• nitrogen compounds in animal waste products are returned to the soil

• Certain types of bacteria can turn nitrogen gas into ammonia through a process called nitrogen fixation

• All of the above

How does photosynthesis in plants affects the carbon cycle?

• Plants take in carbon dioxide in the process of photosynthesis.

• Animals participate in the phosphorus cycle by eating plants that absorb phosphorus.

• It is converted to ammonia by nitrogen fixing plants. 

Which activity does NOT contribute to the increase in carbon dioxide in the atmosphere?

• Burning Fossil Fuels

• Planting More Trees

• Cutting Down Trees

• Driving a Car

Respiration and photosynthesis are central to this process

• Sulfur-cycle
• phosphorous-cycle
• Carbon-cycle
• Nitragen-cycle

Nitrification happens in the ______

• Air 
• Soil 
• Ground Water 
• Plants 

What letter would you title photosynthesis?

• J

• E

• C

• R

What type of energy is stored?

• Potential

• Kinetic

• Thermal

• Electrical

Fill in the blank: Primary producers transfer energy from a BLANK form to a BLANK form

• living form to nonliving form

• nonliving to living

• nonliving to nonliving

• living to living