Ecology Review Part 2 - Nutrient Cycles

Multiple Choice

This is an image of...

• Phosphorous Cycle

• Water Cycle

• Nitrogen Cycle

• Carbon Cycle

Multiple Choice

What is happening at 1?

• respiration: releasing CO₂

• decomposing CO₂ in the soil

• photosynthesis: absorbing CO₂

• turning CO₂ from the atmosphere into organic molecules

Multiple Choice

What is happening at 2?

• respiration: releasing CO₂

• decomposing CO₂ in the soil

• photosynthesis: absorbing CO₂

• turning CO₂ from the atmosphere into organic molecules

Multiple Choice

What is happening at 4?

• respiration: releasing CO₂

• decomposing CO₂ in the soil

• photosynthesis: absorbing CO₂

• turning CO₂ from the atmosphere into organic molecules

Multiple Choice

Combustion is another word for __________.

• Transportation

• Respiration

• Fossil Fuels

• Burning

Multiple Choice

Burning fossil fuel has which effect in the carbon cycle?

• It removes carbon dioxide from the atmosphere.

• It puts carbon dioxide under the ground.

• It adds carbon dioxide to the atmosphere.

• It has no effect in the carbon cycle.

Multiple Choice

This process removes carbon from the atmosphere?

• combustion

• cellular respiration

• photosynthesis

• decomposition

Multiple Select

Which process(es) release carbon dioxide? Select all that apply

• respiration

• combustion

• photosynthesis

• feeding

• decomposition

Multiple Choice

What role do animals play in the carbon cycle?

• absorb carbon dioxide from the atmosphere

• give off carbon dioxide through respiration

• combustionm

• decomposing matter

Multiple Choice

Human activity can increase carbon ( CO₂ ) levels in the atmosphere through

• Photosynthesis

• Burning of fossil fuels

• Planting more trees

• Adding nitrogen to fertilizer.

Multiple Choice

Which gas do plants release, that humans depend on for survival?

• Water

• Carbon Dioxide

• Oxygen

• Sugar

Multiple Choice

Respiration is the process by which animals take in _____ and release _____. 

• photosynthesis, air

• carbon, oxygen

• oxygen

• oxygen, carbon dioxide

Multiple Choice

Which statement is true about the carbon dioxide-oxygen cycle?

• animals breathe in nitrogen and release oxygen which is used by plants

• animals breathe in oxygen and release carbon dioxide which is used by plants

• animals breathe in nitrogen and release carbon dioxide which is used by plants

• animals breathe in carbon dioxide and release oxygen which is used by plants

Multiple Choice

If the plant population decreased, the amount of carbon in the atmosphere would _________.

• Stay the same

• Increase

• Decrease

Multiple Choice

This is an image of the...

• Carbon Cycle

• Nitrogen Cycle

• Phosphorous Cycle

• Unicycle

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

Multiple Choice

The most important factor in converting nitrogen into usable forms during the nitrogen cycle is...

• Animals

• Plants

• Bacteria

• Decomposers

Multiple Choice

Nitrogen in the atmosphere is not available. Free nitrogen has to be changed into a usable form in a process called ____

• nitrogen fixation

• transpiration

• photosynthesis

• cellular respiration

Multiple Choice

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

• Assimilation

• Fixation

• Ammonification

• Denitrification

Multiple Choice

What would happen to this nitrogen cycle if a virus killed all the bacteria?

• Nitrogen would just keep on cycling

• The cycle would stop

• Plants would take over for the bacteria

• Fish would grow more because there's no bacteria