Q: What is given off from plants and taken in by animals? Read this paragraph and choose the correct option from the provided answers: Choices: - methane - sulfur - nitrogen - oxygen A:
oxygen
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Q: What kind of compounds change color when bases come into contact with them, so they can be used to detect bases? Read this paragraph and choose the correct option from the provided answers: Certain compounds, called indicators, change color when bases come into contact with them, so they can be used to detect bases. An example of an indicator is a compound called litmus. It is placed on small strips of paper that may be red or blue. If you place a few drops of a base on a strip of red litmus paper, the paper will turn blue. You can see this in the Figure below . Litmus isn't the only detector of bases. Red cabbage juice can also detect bases, as you can see in this video: http://www. youtube. com/watch?v=vrOUdoS2BtQ . Choices: - liquid - parameters - metals - indicators A:
indicators
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Q: What term did schrodinger use for regions around the nucleus where electrons are most likely to be? Read this paragraph and choose the correct option from the provided answers: Schrodinger developed an equation that could be used to calculate the chances of an electron being in any given place around the nucleus. Based on his calculations, he identified regions around the nucleus where electrons are most likely to be. He called these regions orbitals . As you can see in the Figure below , orbitals may be shaped like spheres, dumbbells, or rings. In each case, the nucleus of the atom is at the center of the orbital. You can see animated models of orbitals this URL: http://www. chemistry. wustl. edu/~edudev/Orbitals/movie. html . Choices: - arrays - isotopes - ellipses - orbitals A:
orbitals
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Q: Most autotrophs make their "food" through which process, using the energy of the sun? Read this paragraph and choose the correct option from the provided answers: Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their "food" through photosynthesis using the energy of the sun. Choices: - glycolysis - atherosclerosis - oculitis - photosynthesis A:
photosynthesis
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