What was the experimental variable in the experiment?
A) Pesticide Z
B) The number of grasshoppers receiving the pesticide
C) The location of the fields
D) The water sprayed on the fields
A
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The majority ethnic group in China is the
A) Han. B) Miao. C) Hmong. D) Uyghur. E) Dong.
Which compound below would NOT contribute to salt weathering?
a. silicon dioxide b. sodium chloride c. calcium sulfate d. calcium carbonate
Of the four most abundant gases in our atmosphere, water vapor shows the greatest variation at Earth’s surface?
a. True b. False
Judge the following sentence according to the criteria given below: Internal waves are associated with pycnoclines BECAUSE these waves travel along the boundary between waters of different density
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.