Q: What type of change occurs when matter changes chemically into an entirely different substance with different chemical properties? Read this paragraph and choose the correct option from the provided answers: Did you ever make a "volcano," like the one in Figure below , using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance with different chemical properties. When vinegar and baking soda combine, they form carbon dioxide, a gas that causes the bubbles. It's the same gas that gives soft drinks their fizz. Choices: - physical - material - genetic - chemical A:
chemical
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Q: When water particles become hot enough to overcome the force of attraction between them, what happens to the water? Read this paragraph and choose the correct option from the provided answers: If water gets hot enough, it starts to boil. Bubbles of water vapor form in boiling water. This happens as particles of liquid water gain enough energy to completely overcome the force of attraction between them and change to the gaseous state. The bubbles rise through the water and escape from the pot as steam. Choices: - it freezes - it pools - it evaporates - it boils A:
it boils
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Q: Most terrestrial vertebrates have what type of lungs? Read this paragraph and choose the correct option from the provided answers: Choices: - extra - external - mechanical - internal A:
internal
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Q: What is the amide bond that occurs between the amino nitrogen of one amino acid and the carboxyl carbon of another amino acid? Read this paragraph and choose the correct option from the provided answers: A peptide bond is the amide bond that occurs between the amino nitrogen of one amino acid and the carboxyl carbon of another amino acid. The resulting molecule is called a dipeptide. Notice that the particular side chains of each amino acid are irrelevant since the R groups are not involved in the peptide bond. Choices: - a covalent bond - a magnetite bond - a amino bond - a peptide bond A:
a peptide bond
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