are these correct?
29. A common feature of thermal pollution and artificial eutrophication is that they both
a. ave sources that are idfficult to identify and control
b. cause large mats of algae to bloom in fresh water
c. are a result of power plants and other industrial activity
d. decrease the amount of oxygen dissolve din water
D
33. A true statement about greenhouse gases is that they
a. convert sunlight into heat energy that warms Earth
b. are concentrated in the stratosphere
c. trap heat that is radiated upward from Earth
d. are not affected by human activity
I don't think it's B or D. But I'm not sure what the correct answer is.
42. The critical difference between today's global warming and Earth's previous climate changes is that
a. human-made chemicals such as CFCs do not influence global warming
b. previous changes in climate were dramatic but very short-lived
c. scientists can now save all species from extinction by genetic engineering
d. global warming may occur much more rapidly than it did during previous climate changes due to rising carbon dioxide levels
D
I am guessing you have Lincoln Interactive?
For question 29, the correct answer is D - decrease the amount of oxygen dissolved in water.
To arrive at this answer, you can eliminate options A and C since they are not accurate descriptions of thermal pollution and artificial eutrophication. Option B is incorrect because it describes the specific effect of artificial eutrophication, not thermal pollution. On the other hand, option D accurately describes the common feature of both thermal pollution and artificial eutrophication, which is the decrease in the amount of oxygen dissolved in water.
For question 33, the correct answer is C - trap heat that is radiated upward from Earth.
To approach this question, you can eliminate options B and D. Option B is incorrect because greenhouse gases, such as carbon dioxide and methane, remain concentrated in the troposphere, not the stratosphere. Option D is also incorrect because greenhouse gases are indeed affected by human activity, contributing to the increase in greenhouse gas emissions and global warming. Finally, option C is the correct answer as it accurately describes the function of greenhouse gases, which trap heat radiated upward from Earth, leading to the greenhouse effect.
For question 42, the correct answer is D - global warming may occur much more rapidly than it did during previous climate changes due to rising carbon dioxide levels.
To determine the correct response for this question, you can rule out options A, B, and C as they do not accurately represent the critical difference between today's global warming and Earth's previous climate changes. Option D is the correct answer because it highlights the significant factor of rising carbon dioxide levels contributing to the potential for more rapid global warming compared to previous climate changes.