Answer the following question given this paragraph: Molten Salts and Ionic Liquids Heating a salt to its melting point produces a molten salt. If we heated a sample of solid NaCl to its melting point of 801C, for example, it would melt to give a stable liquid that conducts electricity. The characteristics of molten salts other than electrical conductivity are their high heat capacity, ability to attain very high temperatures (over 700C) as a liquid, and utility as solvents because of their relatively low toxicity. Molten salts have many uses in industry and the laboratory. For example, in solar power towers in the desert of California, mirrors collect and focus sunlight to melt a mixture of sodium nitrite and sodium nitrate. The heat stored in the molten salt is used to produce steam that drives a steam turbine and a generator, thereby producing electricity from the sun for southern California. Due to their low toxicity and high thermal efficiency, molten salts have also been used in nuclear reactors to enable operation at temperatures greater than 750C. One prototype reactor tested in the 1950s used a fuel and a coolant consisting of molten fluoride salts, including NaF, ZrF 4, and UF4. Molten salts are also. Q: Ionic liquids heating a salt to its melting point produces a what? Choices: - table salt - plasma - gas - molten salt A:
molten salt
(Question)
Answer the following question given this paragraph: Heterotrophic organisms use organic compounds, usually from other organisms, as carbon sources. Q: Heterotrophic organisms use organic compounds, usually from other organisms, as a source of what basic element of life? Choices: - oxygen - monoxide - hydrogen - carbon A:
(Answer)
carbon
Ques: Answer the following question given this paragraph: Like plants, animals are multicellular eukaryotes. However, animals differ from plants in other important ways. Q: Like plants, animals are multicellular what? Choices: - isolates - prokaryotes - membranes - eukaryotes A:
Ans: eukaryotes
(Q).
Answer the following question given this paragraph: Farsightedness, or hyperopia, is the condition in which distant objects are seen clearly, but nearby objects are blurry. It occurs when the eyeball is shorter than normal. This causes images to be focused in back of the retina. Hyperopia can be corrected with convex lenses. The lenses focus images farther forward in the eye, so they are on the retina instead of behind it. Q: Farsightedness, or hyperopia, is the condition in which distant objects are seen clearly, but nearby objects are? Choices: - inverted - darker - invisible - blurry A:
(A).
blurry
Ques:Answer the following question given this paragraph: The arrow in Figure above shows that the reaction goes from left to right, from hydrogen and oxygen to water. The reaction can also go in the reverse direction. If an electric current passes through water, water molecules break down into molecules of hydrogen and oxygen. This reaction would be represented by a right-to-left arrow in Figure above . Q: If an electric current passes through water, water molecules break down into molecules of what? Choices: - carbon and oxygen - hydrogen and carbon - oxygen and methane - hydrogen and oxygen A:

Ans:hydrogen and oxygen
Question: Answer the following question given this paragraph: The study of rock strata is called stratigraphy . The laws of stratigraphy can help scientists understand Earth's past. The laws of stratigraphy are usually credited to a geologist from Denmark named Nicolas Steno. He lived in the 1600s. The laws are illustrated in the Figure below ; refer to the figure as you read about Steno's laws below. Q: What is the study of rock strata called? Choices: - biochemistry - chemistry - biology - stratigraphy A:
Answer:
stratigraphy