Answer the following question given this paragraph: The layers of the atmosphere are divided by their temperature gradients. The lowest layer is the troposphere. All weather takes place in this layer. The next layer is the stratosphere. The stratosphere contains the protective ozone layer. More sunlight strikes at the Equator than at the poles. This is what drives the global winds. Warm air rises, moves poleward, and then sinks when it meets with air moving toward the Equator. The result is six atmospheric circulation cells around the world. There are three cells in each hemisphere. Pollutants enter the atmosphere from a few sources. The most important is fossil fuel burning. Air pollution has bad effects on the environment and on human health. By reducing fossil fuel use we can make the environment cleaner. When ozone depletion was found to be a problem, the world acted. As a result, the ozone hole has stabilized. The hole will be getting smaller over the next decades. Q: How are layers of the atmosphere divided? Choices: - air gradients - color gradients - density gradients - temperature gradients A:
temperature gradients
(Question)
Answer the following question given this paragraph: Q: Which action of the stomach helps chemical digestion by gastric juice? Choices: - peristalsis - chewing - contraction - churning action A:
(Answer)
churning action
Ques: Answer the following question given this paragraph: Nearly all fish reproduce sexually and have separate sexes. Q: Nearly all fish reproduce sexually and have what? Choices: - modified sexes - flexible sexes - single sexes - separate sexes A:
Ans: separate sexes
(Q).
Answer the following question given this paragraph: Elements can be identified by their atomic number and mass number. Q: What substance can be identified by their atomic number and mass number? Choices: - structures - compounds - solutions - elements A:
(A).
elements
Ques:Answer the following question given this paragraph: Sexual reproduction occurs in a cycle. Diploid parents produce haploid gametes that unite and develop into diploid adults, which repeat the cycle. This series of life stages and events that a sexually reproducing organism goes through is called its life cycle . Sexually reproducing organisms can have different types of life cycles. Three are described in the following sections. Q: This series of life stages and events that a sexually reproducing organism goes through is called its what? Choices: - maturation cycle - development cycle - formative period - life cycle A:

Ans:life cycle
Question: Answer the following question given this paragraph: Nuclear power is a controversial subject in California and most other places. Nuclear power has no pollutants including no carbon emissions. However, power plants are not always safe. The long-term disposal of wastes is a problem that has not yet been solved. The future of nuclear power is murky. Find out more at: http://science. kqed. org/quest/audio/new-nuclear/. Q: What kind of power does not produce any pollutants, but produces waste that can be difficult to dispose of? Choices: - electrical - biofuel - solar - nuclear A:
Answer:
nuclear