Answer the following question given this paragraph: A solution is a mixture of two or more substances that has the same composition throughout. Some solutions are acids, some are bases. Q: Acidity is measured by what physical property? Choices: - k - ps - amp - ph A:
ph
(Question)
Answer the following question given this paragraph: A series of chemical reactions where an initial amount of copper reacts with nitric acid, goes into solution, and disappears. Then a series of reactions proceed, only to have the copper metal recovered. The copper cycle is a good illustration of how mass is conserved in a given chemical reaction. Q: The cycle of copper reacting is a good example of what principle? Choices: - law of inertia - conservation of energy - conservation of momentum - conservation of mass A:
(Answer)
conservation of mass
Ques: Answer the following question given this paragraph: Another important aspect of a species' niche is its habitat. Habitat is the physical environment in which a species lives and to which it has adapted. Features of a habitat depend mainly on abiotic factors, such as temperature and rainfall. These factors influence the traits of the organisms that live there. Q: What is the physical environment in which a species lives and to which it has adapted? Choices: - ecosystem - land mass - farmland - habitat A:
Ans: habitat
(Q).
Answer the following question given this paragraph: An enzyme is an organic catalyst produced by a living cell. Enzymes are such powerful catalysts that the reactions they promote occur rapidly at body temperature. Without the help of enzymes, these reactions would require high temperatures and long reaction times. The molecule or molecules on which an enzyme acts are called its substrates. An enzyme has an active site where its substrate or substrates bind to form an enzymesubstrate complex. The reaction occurs, and product is released:. Q: An enzyme is an organic catalyst produced by what? Choices: - DNA - the liver - amino acid - living cell A:
(A).
living cell
Ques:Answer the following question given this paragraph: Acid rain is rain that has a pH less than 5 (see Figure below ). The pH of normal rain is 5.6. It's slightly acidic because carbon dioxide in the air dissolves in rain. This forms carbonic acid, a weak acid. Q: What is the term for rain that has a ph less than 5, due to carbon dioxide dissolving? Choices: - frozen rain - basic rain - carbon rain - acid rain A:

Ans:acid rain
Question: Answer the following question given this paragraph: Q: Drip iirigation requires less water and reduces what? Choices: - moisture - bacteria - sediment - salinization A:
Answer:
salinization