Large volcanic eruptions that eject sulfur-rich veils into the stratosphere tend to ____ at Earth's surface
A) increase temperatures
B) increase precipitation
C) decrease temperatures
D) have no effect
C
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The oils in plants, such as those in chaparral group, evolved to defend the plants against insects also ________.
A. help them regrow bark after a fire B. make them more flammable C. attract the lightning strikes need to start fires D. help them to resist wildfires
How did the South Atlantic Ocean form?
a) Asia rifted apart form Europe b) Africa and North America collided to form the Appalachian Mountains c) a piece of California started moving northward up the west coast d) south America rifted apart from Africa e) none of the above
The Coriolis force decreases to zero at the North Pole
Indicate whether the statement is true or false
The principal source of water in the oceans and the atmosphere is by the process of _________.
a. halocline b. thermocline c. outgassing d. turbidity