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aw2

Public contributions from visitors who posted under the name aw2.

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What are the benefits and drawbacks to using solar, geothermal, and wind power as alternative sources of energy?
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Explain how ozone is both beneficial and detrimental to human health.
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Trees obtain carbon from _______. a. decaying organisms b. sunlight c. the atmosphere d. none of the above
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he desert relies on precipitation from weather patterns, while the rainforest can create its own precipitation. Please select the best answer from the choices provided
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Cycles are essential to all living organisms. Please select the best answer from the choices provided
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Fertilizer runoff has a negative impact on aquatic ecosystems because _______. a. it causes plants and algae to grow quickly, suffocating organisms in the water b. phosphorus is not found in nature c. phosphorus is poiso...
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Phosphorus plays an important role within the structures of the body. Which of the following structures is phosphorus found in? a. bones b. cell membranes c. DNA d. all of the above Please select the best answer from the...
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How can recycling water improve the environment? (Site 1)
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What organic materials make up limestone? What type of mineral and what percent of it determine if a rock is limestone? (Site 2)
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Why do fluctuations in abiotic cycles have an impact on living organisms and on ecosystems as a whole?
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Why is water pollution a concern if water is continuously cycled through Earth’s systems?
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Where is the water stored during the water cycle? a. the atmosphere b. the ground c. the ocean d. all of the above Please select the best answer from the choices provided A B C D
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What percentage of precipitation falls back onto land? a. 78% b. 92% c. 17% d. 22% Please select the best answer from the choices provided A B C D
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Which of the following statements is true? a. The nitrogen cycle is the most important cycle for life. b. The oxygen cycle is the least important cycle for life. c. Life can be sustained without any of the cycles for lif...
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The growing of plants, burning of wood, and decomposition of living matter demonstrate how carbon can be in the _______ at the same time. a. atmosphere and biosphere b. biosphere and geosphere c. geosphere and atmosphere...
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The sun is the ultimate source for energy on the Earth. Please select the best answer from the choices provided
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The biogeochemical cycles move through biotic and abiotic regions. Please select the best answer from the choices provided
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Which of the following does not take place in the water cycle? a. precipitation b. evaporation c. carbonation d. condensation A B C D
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The need for energy, gained by respiration and photosynthesis, is the driving force of the oxygen cycle. Please select the best answer from the choices provided T F
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Explain how the biosphere, hydrosphere, geosphere, and atmosphere are interconnected.
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Explain how the numerous factors used to measure climate contribute to the large variety of instruments required to measure climate change.
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Explain how the biogeochemical cycles are essential for life.
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Four compasses are placed around a wire, as shown. A long wire that is vertical and standing on a steel plate. There are 4 compasses surrounding it and all of the needles are pointing in the same direction, west. The wir...
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A wire is joined to points X and Y in the circuit diagram shown. A diagram of a circuit with a power source on the left. Directly above the power source is a dot labeled X and then a circle with an X in it. The circuit t...
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A 6 cm object is 15 cm from a convex lens that has a focal length of 5 cm. What is the distance of the image from the lens, to the nearest hundredth? –33.33 cm –7.50 cm 7.50 cm 33.33 cm
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