Ques:Answer the following question given this paragraph: Water cycling is extremely important to ecosystem dynamics. Water has a major influence on climate and, thus, on the environments of ecosystems, some located on distant parts of the Earth. Most of the water on Earth is stored for long periods in the oceans, underground, and as ice. Figure 46.13 illustrates the average time that an individual water molecule may spend in the Earth's major water reservoirs. Residence time is a measure of the average time an individual water molecule stays in a particular reservoir. A large amount of the Earth's water is locked in place in these reservoirs as ice, beneath the ground, and in the ocean, and, thus, is unavailable for short-term cycling (only surface water can evaporate). Q: What important liquid is stored throughout the earth in the oceans, underground, and in ice? Choices: - oil - lava - air - water A:

Ans:water
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Ques:Answer the following question given this paragraph: Ocean water is salty because water dissolves minerals out of rocks. This happens whenever water flows over or through rocks. Much of this water and its minerals flow in rivers that end up in the oceans. Minerals dissolved in water form salts. When the water evaporates, it leaves the salts behind. As a result, ocean water is much saltier than other water on Earth. Q: Water dissolving minerals out of rocks makes ocean water what? Choices: - muddy - bitter - sweet - salty A:

Ans:salty
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Ques:Answer the following question given this paragraph: Chemical reactions vary widely in the speeds with which they occur. Some reactions occur very quickly. If a lighted match is brought in contact with lighter fluid or another flammable liquid, it erupts into flame instantly and burns fast. Other reactions occur very slowly. A container of milk in the refrigerator will be good to drink for weeks before it begins to turn sour. Millions of years were required for dead plants under Earth's surface to accumulate and eventually turn into fossil fuels such as coal and oil. Q: Exemplified by a lit match bursting into flame or the process that forms fossil fuels, chemical reactions vary greatly in terms of what? Choices: - duration - density - power - speed A:

Ans:speed
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Ques:Answer the following question given this paragraph: Compounds form when atoms of different elements combine. This process is a chemical reaction. Q: In which type of reaction are compounds formed? Choices: - gaseous reaction - acid reaction - balanced reaction - chemical reaction A:

Ans:
chemical reaction
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