Ques:Answer the following question given this paragraph: Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them. Q: What is the process in which a liquid changes to a solid? Choices: - condensation - boiling - melting - freezing A:

Ans:freezing
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Ques:Answer the following question given this paragraph: In the lungs, oxygen diffuses out of the alveoli and into the capillaries surrounding the alveoli. Oxygen (about 98 percent) binds reversibly to the respiratory pigment hemoglobin found in red blood cells (RBCs). RBCs carry oxygen to the tissues where oxygen dissociates from the hemoglobin and diffuses into the cells of the tissues. More specifically, alveolar P O 2. Q: In the lungs, oxygen diffuses out of the alveoli and into where? Choices: - blood - neurons - cillia - capillaries A:

Ans:capillaries
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Ques:Answer the following question given this paragraph: The stability of an ecosystem depends on the actions of the decomposers. Examples of decomposers include mushrooms on a decaying log. Bacteria in the soil are also decomposers. Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients. The carbon and nitrogen necessary to build organic compounds, and then cells, allowing an organism to grow, would be insufficient. Other nutrients necessary for an organism to function properly would also not be sufficient. Essentially, many organisms could not exist. Q: The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil? Choices: - whitefly - fluxes - aphids - decomposers A:

Ans:decomposers
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Ques:Answer the following question given this paragraph: Irrigation can waste a lot of water. The type of irrigation shown in Figure below is the most wasteful. The water is sprayed into the air and then falls to the ground. But much of the water never reaches the crops. Instead, it evaporates in the air or runs off the fields. Irrigation water may cause other problems. The water may dissolve agricultural chemicals such as pesticides. When the water soaks into the ground, the dissolved chemicals do, too. They may enter groundwater or run off into rivers or lakes. Salts in irrigation water can also collect in the soil. The soil may get too salty for plants to grow. Q: Irrigation can waste a lot of what natural resource? Choices: - habitat - money - fertilizer - water A:

Ans:
water
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