8.3 Quiz - Cycles of Matter

How does diatomic nitrogen get converted into a form of nitrogen that plants can use, with the help of legumes?

• Plants absorb the nitrogen from the ground through assimilation

• bacteria facilitate the process of nitrogen fixation

• nitrification occurs in root nodules

• nitrogen is found naturally in the ground and plants absorb it with the water they take into their roots

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

• nitrification

• denitrification

• nitrogen assimilation

• nitrogen fixation

What process converts ammonium into nitrites and nitrates?

• ammonification

• nitrogen fixation

• nitrification

• nitrogen assimilation

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

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

Burning fossil fuels impacts the planet by doing what?

• increasing nitrogen into the atmosphere

• increasing carbon into the atmosphere

• increasing methane into the atmosphere

• all of the above

Water gets cycles through ecosystems by

• plants

• animals

• natural processes

• all of the above

Transpiration affects the water cycle by

• evaporating water from oceans

• evaporating water from autotrophs

• evaporating water from heterotrophs

• directly adding water to the water table

The difference between matter and energy in ecosystems is what?

• matter goes through ecosystems while energy gets cycled within ecosystems

• matter and energy are interchangeable, so they both go through and leave ecosystems

• matter and energy are interchangeable so they both cycle within ecosystems

• matter cycles within ecosystems while energy goes through ecosystems