Gasoline overflow from a car's full metal tank on a hot day is evidence that gasoline expands
A. more than metal.
B. less than metal.
C. about the same as metal.
D. none of the above
Answer: A
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A farmer has planted a field of clover as a cover crop to protect his field from erosion during the winter months. In the spring, he plows the clover into the topsoil. What kind of fertilizer does this technique create?
A. green manure B. animal manure C. compost D. synthetic
Which one of the following is the MOST abundant gas in the atmosphere?
A) nitrogen B) carbon dioxide C) oxygen D) hydrogen E) argon
In countries where a population pyramid identifies a youth bulge, there is likely to be intense competition for jobs, land, and education
a. True b. False Indicate whether the statement is true or false
What region borders the Sahara Desert, has highly variable rainfall and a human population dependent on pastoralism?
A) West Africa B) East Africa C) Horn of Africa D) Central Africa E) Sahel