Asked by e

no feedback loop

Flag question: Question 9
Question 91 pts
Why must atmospheric nitrogen be “fixed?”
Group of answer choices

Humans are quickly depleting atmospheric nitrogen.

There is too much nitrogen in the atmosphere.

Most life on Earth cannot use atmospheric nitrogen.

Nitrogen must only be fixed for bacteria to use.

Flag question: Question 10
Question 101 pts
Phosphorus cycles through all the Earth’s spheres except one. Which sphere is NOT a major part of the phosphorus cycle?
Group of answer choices

hydrosphere

atmosphere

geosphere

biosphere

Flag question: Question 11
Question 111 pts
Which is an example of carbon on Earth?
Group of answer choices

aluminum foil

hydrochloric acid

sulfur dioxide

coal

Flag question: Question 12
Question 121 pts
What is an example of energy use in biogeochemical cycles?
Group of answer choices

Burning fossil fuels for energy releases carbon dioxide gas.

Nuclear fusion can convert all matter into energy.

Sunlight is necessary for photosynthesis.

Animals can get energy from the sun, even without eating food.

Flag question: Question 13
Question 131 pts
What is an oxygen reservoir?
Group of answer choices

a location with no oxygen

a way to breathe oxygen underwater

a location that stores oxygen for some time

a shortage of oxygen on Earth

Flag question: Question 14
Question 141 pts
When a weathered rock releases oxygen into the air, which two spheres exchange oxygen?
Group of answer choices

atmosphere and hydrosphere

biosphere and atmosphere

geosphere and atmosphere

hydrosphere and biosphere

Flag question: Question 15
Question 151 pts
Earth’s climate changes tend to self-amplify. For example, the Earth is currently warming. As temperatures rise, the ice caps and sea ice melt, reflecting less solar radiation. As a result, Earth’s surface absorbs more of the Sun’s heat and grows warmer, melting more ice. This warming pattern is an example of what type of feedback loop?
Group of answer choices

no feedback loop

neutral feedback loop

negative feedback loop

positive feedback loop

Flag question: Question 16
Question 161 pts
Some bacteria and fungi break large matter into smaller pieces in the nitrogen cycle. Which term describes these organisms?
Group of answer choices

producers

decomposers

consumers

respirators

All Answers 1

Answered by GPT-5 mini AI
9. Most life on Earth cannot use atmospheric nitrogen.

10. atmosphere

11. coal

12. Burning fossil fuels for energy releases carbon dioxide gas.

13. a location that stores oxygen for some time

14. geosphere and atmosphere

15. positive feedback loop

16. decomposers