Environmental Science - Water Pollution& Cycles of Matter/Energy

What is the main thing that carries out Nitrogen Fixation?

• Lightning

• Bacteria

• Plants

• Humans

How do non-human living things participate in the nitrogen cycle? (fill in the blank/short answer)

• Bacteria decompose organic matter (decomposition)

• animals move nitrogen during consumption

• Bacteria convert waste into ammonia (ammonification)

• All of the above

How does nitrogen get replenished in the atmosphere from the ground?

• nitrification

• denitrification

• nitrogen assimilation

• nitrogen fixation

What role do humans and other living things play in the nitrogen cycle?

• they burn fossil fuels releasing nitrogen into the atmosphere

• they store nitrogen in their bodies and release it into the ground when they die

• they consume large amounts of nitrogen, preventing it from reacting with other atoms in the atmosphere

• animals play no role in the nitrogen cycle

Why are autotrophs important factors in the carbon cycle?

• they consume large amounts of producers and trap carbon

• they hold carbon in their cells as glucose, preventing it from entering the atmosphere

• they burn fossil fuels, releasing carbon into the atmosphere

• autotrophs play no role in the carbon cycle

The release of water vapor from plants is called

• combustion

• transpiration

• evaporation

• condensation

The remains of ancient plants and animals that have been pressurized and buried for millions of years can be mined as

• limestone.

• calcium carbonate.

• wood.

• fossil fuels.

Which processes help to cycle carbon through ecosystems?

• cellular respiration and photosynthesis

• photosynthesis and transpiration

• transpiration and the calvin cycle

• calvin cycle and krebs cycle

Denitrifying bacteria are responsible for changing

• N2 gas into ammonia

• N2 gas into nitrates

• proteins and DNA into ammonia

• ammonia and nitrates into N2 gas

Phosphorus is important in living cells to make

• carbohydrates

• proteins

• DNA and RNA

• storage vacuoles