Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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How does an increase in the amount of carbon dioxide in the atmosphere affect global temperatures?

It decreases them
It increases them
It has no effect
It increases in some areas and decreases in others

The correct answer is: It increases them

An increase in the amount of carbon dioxide in the atmosphere leads to an increase in global temperatures due to the greenhouse effect. Carbon dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, preventing it from escaping into space. As the levels of carbon dioxide increase, more heat is trapped, leading to higher temperatures globally. Therefore, options A and C are incorrect as they suggest a decrease or no effect on global temperatures. Option D is incorrect as it implies that the increase in carbon dioxide has varying effects in different areas, when in reality it leads to an overall increase in global temperatures. Option B is the only correct answer as it accurately explains the relationship between carbon dioxide levels and global temperatures.