Why is chemical weathering more effective in humid climates than arid climates?
What will be an ideal response?
Answer: There are several types of chemical weathering. Their common characteristic is that they are activated by the presence of water and water carries the chemical agents to sites within bedrock via the various types of bedrock openings.
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In cities of less-developed countries, stream pollution is often ____.
A. not a problem because there are fewer industries B. caused by washing clothes in rivers C. caused by dumping 80-90% of raw sewage directly into rivers D. less severe compared to more-developed countries E. unaffected by cultural eutrophication
Judge the following sentence according to the criteria given below: Reef-building corals are able to survive in nutrient-poor tropical waters BECAUSE they capture tiny planktonic food with their stinging tentacles
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
What is the main factor that determines what will happen to a star after it consumes all of its nuclear fuel?
A) temperature B) velocity C) mass D) size E) composition
Which has the greatest speed in a vacuum?
A. Light. B. X-rays. C. Radio waves. D. all the same