Which of the following products made its way to the New World as part of the Columbian Exchange?
A) tomatoes B) potatoes C) corn D) wheat
D) wheat
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Judge the following sentence according to the criteria given below: Chemical dispersant were used as part of the clean up of the BP Deepwater Horizon oil disaster BECAUSE the dispersants are considered less toxic to marine life than the oil
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.
The recycling of plastic bottles to make fleece fabric for clothing is a type of secondary recycling
Indicate whether the statement is true or false
Coal is composed of
A. a combination of oil-rich sediments and calcareous ooze. B. petrified wood. C. buried plant material that has partially decayed. D. buried animal material that has partially decayed.
When Ra decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?
A) atomic number = 86; atomic mass = 222 B) atomic number = 87; atomic mass = 226 C) atomic number = 86; atomic mass = 224 D) atomic number = 87; atomic mass = 224