Answer the following question given this paragraph: Growth and development are most rapid during infancy and slower throughout the rest of childhood until adolescence. Q: Growth and development in humans is most rapid during what two stages? Choices: - bounce and adolescence - teen and adults - flutter and adolescence - infancy and adolescence A:
infancy and adolescence
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Answer the following question given this paragraph: Hydrocarbons are compounds that contain only carbon and hydrogen. They are the simplest type of carbon-based compounds. Q: What are the simplest types of carbon-based compounds? Choices: - particles - Microbes - Cells - hydrocarbons A:
hydrocarbons
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Answer the following question given this paragraph: You already know that a sour taste is one property of acids. ( Warning : Never taste an unknown substance to see whether it is an acid!) Acids have certain other properties as well. For example, acids can conduct electricity when dissolved in water because they consist of charged particles in solution. (Electric current is a flow of charged particles. ) Acids can also react with metals, and when they do they produce hydrogen gas. An example of this type of reaction is hydrochloric acid reacting with the metal zinc (Zn). The reaction is pictured in the Figure below . It can be represented by the chemical equation:. Q: Acids can also react with metals, and when they do they produce what? Choices: - alloys - potassium gas - rust - hydrogen gas A:
hydrogen gas
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Answer the following question given this paragraph: Molecular geometry is the three-dimensional arrangement of atoms in a molecule. The molecular geometry, or shape, of a molecule is an important factor that affects the physical and chemical properties of a compound. Those properties include melting and boiling points, solubility, density, and the types of chemical reactions that a compound undergoes. In this lesson, you will learn a technique to predict molecular geometry based on a molecule's Lewis electron dot structure. Q: Molecular geometry is the three-dimensional arrangement of atoms in a what? Choices: - genes - DNA - nucleus - molecule A:
molecule
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