Question

Flag question: Question 1
Question 12 pts
In biogeochemical cycles, which move or recycle through the Earth’s systems? Select ALL that apply.
Group of answer choices

bacteria

soil

energy

matter

Flag question: Question 2
Question 22 pts
How does oxygen support life on Earth? Select ALL that apply.
Group of answer choices

Living things breathe oxygen.

Oxygen is a product of respiration.

Living things breathe ozone.

The ozone layer protects living things from harmful radiation.

Flag question: Question 3
Question 32 pts
Which molecules in the body require phosphorus? Select ALL that apply.
Group of answer choices

carbonic acid

DNA

phospholipid cell membranes

glucose

Flag question: Question 4
Question 41 pts
What is the BEST term to describe resources a system uses to create output?
Group of answer choices

equilibrium

feedback

output

input

Flag question: Question 5
Question 51 pts
Which form of carbon exists in the geosphere?
Group of answer choices

carbon dioxide in the air

a limestone (CaCO3) formation in a cave

methane (CH4) in the air

glucose (C6H12O6) stored in a plant

Flag question: Question 6
Question 61 pts
Much of the Earth’s nitrogen is in the soil. Soil is a reservoir in which sphere?
Group of answer choices

geosphere

biosphere

hydrosphere

atmosphere

Flag question: Question 7
Question 71 pts
How does phosphorus move from the geosphere to the hydrosphere?
Group of answer choices

Decomposing organic matter releases phosphorus back into the soil.

Plants take up phosphates from the soil.

Weathering and erosion break down phosphate rocks into small sediments that dissolve in water.

Bacteria break down phosphorus and release it into the atmosphere.

Flag question: Question 8
Question 81 pts
What type of feedback loop works to counteract changes or disturbances in the system to maintain equilibrium and stability?
Group of answer choices

neutral feedback loop

negative feedback loop

positive feedback loop

no feedback loop

Answer 1

Question 1: soil; matter

Question 2: Living things breathe oxygen.; The ozone layer protects living things from harmful radiation.

Question 3: DNA; phospholipid cell membranes

Question 4: input

Question 5: a limestone (CaCO3) formation in a cave

Question 6: geosphere

Question 7: Weathering and erosion break down phosphate rocks into small sediments that dissolve in water.

Question 8: negative feedback loop