Each student group was given the following: For each group: 2 Alka-Seltzer® antacid tablets 1/2 sheet of blank paper 1 film canister (with hole in lid) 3-4" (2 cm) piece of foam for a fin The students all brainstormed and came up with variables that might be manipulated to win the boat challenge. The group data is compiled in the data table. Compare the criteria and results of the four student groups. Which group had the fastest boat? A) Design 1 B) Design 2 C) Design 3 D) Design 4

answer; the correct answer is (beta)

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

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.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).