Which process contributes to the development of soil creep?
A. Wetting-drying cycles
B. Freeze-thaw cycles
C. Planar surfaces in rock
D. Volcanic tremors
Answer: B
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Why is heat often added to chemical reactions performed in the laboratory?
A) to allow a greater number of reactants to pass over the activation energy B) to increase the rate at which reactant collide C) to compensate for the natural tendency of energy to disperse D) all of the above
Which of the following geoengineering techniques involves capturing greenhouse gases from
smokestacks and pumping it underground? a. fertilizing the ocean b. carbon capture and sequestration c. solar radiation management d. large-scale forestation e. atmospheric capture of CO2
If someone wanted to reduce her animal protein intake and have the least impact on fertilizer pollution and greenhouse gas emission, the best food choice for her would be
A) poultry. B) pork. C) eggs. D) dairy products.
Although the majority of South Africa was black, whites had exclusive control of the politicaland economic systems for a long time.Who was the first black South African president?
a. Haile Selassie b. Nelson Mandela c. Joseph Kabila d. Frederik de Klerk e. Mobutu Sese Seko