Answer the following question given this paragraph: Electron Shells and the Bohr Model It should be stressed that there is a connection between the number of protons in an element, the atomic number that distinguishes one element from another, and the number of electrons it has. In all electrically neutral atoms, the number of electrons is the same as the number of protons. Thus, each element, at least when electrically neutral, has a characteristic number of electrons equal to its atomic number. An early model of the atom was developed in 1913 by Danish scientist Niels Bohr (18851962). The Bohr model shows the atom as a central nucleus containing protons and neutrons, with the electrons in circular orbitals at specific distances from the nucleus, as illustrated in Figure 2.6. These orbits form electron shells or energy levels, which are a way of visualizing the number of electrons in the outermost shells. These energy levels are designated by a number and the symbol "n. " For example, 1n represents the first energy level located closest to the nucleus. Q: What is the number of electrons equal to in every electrically neutral atom? Choices: - Electrons - molecules - nucleus - protons A:
protons
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Answer the following question given this paragraph: Cloning is the process of creating an exact genetic replica of an organism. The clone's DNA is exactly the same as the parent's DNA. Bacteria and other single-celled organisms have long been able to clone themselves through asexual reproduction. Plants can also reproduce asexually. In animals, however, cloning does not happen naturally. In 1997, that all changed when a sheep named Dolly was the first large mammal ever to be successfully cloned. Other animals can now also be cloned in a laboratory. Q: What is the process of creating an exact genetic replica of an organism called? Choices: - reproducing - copying - converting - cloning A:
cloning
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Answer the following question given this paragraph: recycling: Takes used items and materials and turns it into something new. For example, 98% of car batteries are recycled today. In the processing plant, the plastic materials are separated from the lead, so the plastic can then be used for many applications. Q: What term means taking used items and materials and turning them into something new? Choices: - reproducing - collecting - feeding - recycling A:
recycling
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Answer the following question given this paragraph: Photosynthesis and cellular respiration are connected through an important relationship. This relationship enables life to survive as we know it. The products of one process are the reactants of the other. Notice that the equation for cellular respiration is the direct opposite of photosynthesis :. Q: Which process acts as a natural complement for cellular respiration? Choices: - glycolysis - atherosclerosis - absorption - photosynthesis A:
photosynthesis
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