Neville is testing a hypothesis through experimentation. He believes that raising the temperature difference between two water samples will lead to stronger circular currents when the samples are mixed together. Which of these actions would be considered a mistake in Neville’s experiment? A. He measures the strength of each current using the same flow meter. B. He randomly varies the volume of hot and cold water across his trials. C. He reruns the experiment after fixing calibration problems with his thermometers. D. He uses glass containers to hold the water samples instead of plastic ones. E. He states his hypothesis prior to beginning any of his experimental trials.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

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a physical change is being made.