Carbon & Nitrogen Cycles

What is the ultimate goal of a compost bin?

• A place to put dead plants.

• Nutrient rich organic material.

• Inorganic grass clippings.

• Backyard project for waste removal.

What are two major elements compost can provide?

• oxygen and nitrogen

• carbon and oxygen

• carbon and nitrogen

• oxygen and fertilizer

Molecules that contain carbon are known to be what?

• inorganic molecules

• organic molecules

• carbon rich

• carbon poor

Where is carbon found?  (carbon reservoirs)  Select all that apply.

• Ocean

• Living Organisms

• Rocks

• Atmosphere

• Fossil Fuels

What takes in carbon dioxide from the atmosphere?

• Photosynthetic organisms (plants, algae)

• Fungi

• Animals

How does an animal get carbon?  Select all that apply.

• It eats another animal that ate a plant.

• It takes in carbon dioxide from the atmosphere when it breaths in.

• It eats a plant or other photosynthetic organism.

How does carbon dioxide get back into the atmosphere?

• It is released by solid waste excreted by animals.

• It is released by plants and animals through the process of cellular respiration.

• It is released by plants through the process of photosynthesis.

After a long, long time, the carbon from the remains of dead organisms can be stored in:

• Fossil Fuels

• Water

• Rocks

Since carbon dioxide in the atmosphere (released from burning fossil fuels) is a greenhouse gas, which means it traps HEAT, what human-related issue is it thought to cause?

• Global warming

• Habitat destruction

• Deforestation

• Global cooling

The atmosphere is the PRIMARY reservoir for nitrogen. What percent of the air is Nitrogen?

• 15%

• 10%

• 78%

• 33%