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- 1. Multiple Choice
Jim is a long-distance runner. After one of his workouts, drenched in sweat, he headed back to his house to eat lunch. After lunch, he noticed that he was completely dry. Which of the following terms explains the part of the water cycle that Jim experienced between the end of his run and after lunch?
evaporation
precipitation
condensation
decomposition
- 2. Fill in the Blank
Baruch is interested in the carbon cycle. He learns that carbon enters the forest from the atmosphere by the sugar-making process of...
- 3. Multiple Choice
Which law states that there is a fixed amount of nitrogen on Earth?
Law of Conservation of Energy
Law of Conservation of Mass
- 4. Multiple Choice
Nitrogen that exists in the air is "fixed" by what organisms living in root nodules?
plants
bacteria
fungi
trees
- 5. Multiple Choice
Once nitrogen has been fixed by bacteria in the soil or in the root nodules of plants, what type of organisms uses the nitrogen to make proteins?
bacteria
plants
animals
fungi
- 6. Multiple Choice
When organisms die, the nitrogen in their bodies is broken down by what type of organisms?
fungi
plants
animals
trees
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