People living in the Andes Mountains approximately 5,000 years ago domesticated ________
A) chickpeas B) wheat C) potatoes D) barley E) corn
Answer: C
Environmental & Atmospheric Sciences
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Which of the following affects the half-life of a radioactive sample?
A) the age of sample B) the size of the sample C) the temperature of the sample D) none of these
Environmental & Atmospheric Sciences
An unusual feature of the Russian population compared to other regions is that
A. birth rates are very high B. birth rates are rising C. death rates are rising after having fallen D. population is rising rapidly
Environmental & Atmospheric Sciences
This cloud sometimes produces "mare's tails"
cirrostratus cumulonibus altostratus cirrus
Environmental & Atmospheric Sciences
What is considered to be the densest type of crust?
A) Basalt B) Continental crust C) Granite D) None of these choices
Environmental & Atmospheric Sciences