What is the principal difference between craters and calderas?
A) Calderas are much larger depressions created by collapse of the upper portions of the volcano.
B) Calderas are associated with cinder cones, while craters are associated with shield volcanoes.
C) Craters are created by explosive eruptions, while calderas are not.
D) Craters are associated only with fissure eruptions.
A
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The pressure exerted on rocks by the weight of overlying rocks is called ____________________
pressure. With this type of pressure, the stress on the rock is the ____________________ in all directions. Fill in the blank(s) with the appropriate word(s).
Sachiko and Fred are having a discussion about the scientific method. Sachiko makes the comment that every time she sees people carrying open umbrellas, she also sees car accidents. This is a(n) ________
A) theory about umbrellas B) observation C) hypothesis D) theory about car accidents E) scientific study
A parcel of saturated air at 20°C would have approximately ________ times ________ water vapor than saturated air at 0°C.
A. 20; more B. 20; less C. 5; more D. 5; less
The history of world agriculture is characterized by long periods of no change interrupted with short periods of major change
Indicate whether this statement is true or false