This diagram shows magnetic stripes on either side of the mid-ocean ridge. How many times did the magnetic field change polarity to form all of the stripes shown here?
A. eleven times
B. three times
C. twice
D. five times
Answer: D
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What water mass is the most saline?
A) North Atlantic Water B) Mediterranean Deep Water C) Antarctic Bottom Water D) North Atlantic Intermediate Water
The overall effect of aerosols is to ________
A) warm the planet B) decrease CO2 C) increase ocean temperatures D) cool the planet E) increase CO2
Fjords, which were created by glaciers, are found in France
Indicate whether the statement is true or false
Which of the following statements regarding the black widow spider is correct?
A) The venom of a black widow spider contains a necrotoxin, which results in local tissue necrosis. B) Because the mortality rate from a black widow spider bite is about 40%, a prehospital antidote is crucial. C) Following a black widow spider bite, the patient's abdomen is often rigid due to severe muscle spasms. D) The male black widow spider, which is the sex that poses a danger to humans, contains a red hourglass on its back.