How do energy and matter move in ecosystems?(10 points)
Responses
Energy flows in one direction, and matter cycles through the environment.
Energy flows in one direction, and matter cycles through the environment.
Energy and matter cycle through the environment.
Energy and matter cycle through the environment.
Question 2
The three steps of the nitrogen cycle in order, starting with nitrogen gas in the atmosphere, are(10 points)
Responses
nitrogen fixation, nitrification, and denitrification.
nitrogen fixation, nitrification, and denitrification.
denitrification, nitrification, and nitrogen fixation.
denitrification, nitrification, and nitrogen fixation.
Question 3
The nitrogen cycle requires _____ to convert nitrogen to nitrites and nitrates.(10 points)
Responses
bacteria
bacteria
animals
animals
Question 4
How does the carbon stored in the bodies of living organisms move into rocks?(10 points)
Responses
Living organisms decay, releasing carbon into the soil, and soil is compacted into rocks.
Living organisms decay, releasing carbon into the soil, and soil is compacted into rocks.
Living organisms decay and become fossils fuels, which eventually become rocks.
Living organisms decay and become fossils fuels, which eventually become rocks.
Question 5
Which role does photosynthesis play in the flow of energy? (10 points)
Responses
Photosynthesis provides radiant energy to all the organisms in the entire food chain.
Photosynthesis provides radiant energy to all the organisms in the entire food chain.
Photosynthesis converts radiant energy to chemical energy to be used by organisms in the food chain.
Photosynthesis converts radiant energy to chemical energy to be used by organisms in the food chain.
Question 6
One molecule of glucose is recycled into ___ molecules of carbon dioxide during cellular respiration.(10 points)
Responses
6
6
2
2
Question 7
ATP stores some of the energy from glucose molecules during cellular respiration. How is the remaining energy from these glucose molecules released?(10 points)
Responses
Excess heat
Excess heat
Excess water
Excess water
Question 8
ATP is(10 points)
Responses
a form of energy that cannot be stored
a form of energy that cannot be stored
a form of energy that can be used and stored
a form of energy that can be used and stored
Question 9
A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the container in direct sunlight. The scientist observes small bubbles on the surfaces of the plant’s leaves on days 1 and 2, but no bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis. Which substance should be added to the water in order for the bubbles to reappear?(10 points)
Responses
oxygen
oxygen
carbon dioxide
carbon dioxide
Question 10
Which process in photosynthesis uses energy from the sun?(10 points)
Responses
splitting water into hydrogen and oxygen
splitting water into hydrogen and oxygen
releasing oxygen