Ecology Review #3

Name the process where nitrogen is changed from N2 gas to Ammonia for plants to use.

• Nitrogen Fixation

• Nitrification

• Denitrification

• Ammonification

How does Nitrogen become part of the food chain?

• through transpiration by plants

• through animals eating other animals

• through the uptake of nitrogen compounds in the soil by plants

• from the air

We use what compound to make DNA and Proteins

• Oxygen

• Carbon

• Nitrogen

• Water

How do animals get carbon?

• Decomposing

• Consuming plants (or animals that eat plants)

• Denitrification

• Breathing in CO2

Which of the following in not a step of the water cycle?

• Transpiration

• Ammonification

• Precipitation

• Evaporation

How does carbon dioxide (CO2) leave the atmosphere and become part of a food chain?

• It soaks into the soil

• Bacteria "fix" the carbon to be usable

• Plants intake CO2 in photosynthesis

• Sunlight

Which of the following ways is NOT how animals are involved in the carbon cycle?

• animals die, returning carbon to the soil

• Animals breath out CO2

• Animals breath in CO2

• Animals eat plants that contain carbon

What are ways humans contribute to the amount of carbon dioxide in the air?

• burning fossil fuels

• factories

• driving cars

• all of the answers are correct.

True or False: Animals and plants cannot use the nitrogen in the atmosphere (N2).

• True

• False

What process in the water cycle changes water vapor to liquid water?

• Condensation

• Precipitation

• Evaporation

• Melting