What two factors speed up rates of chemical reaction and weathering in rocks and soils?
a. low temperatures; very moist
b. low temperatures; very dry
c. high temperatures; very dry
d. warm temperatures; very moist
a. true
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A wind direction of 270 degrees means that the wind is blowing from the southeast
Indicate whether the statement is true or false
The type of marine sediment that forms the thickest deposits worldwide is ________
A) abyssal clay deposits B) manganese nodule deposits C) neritic, lithogenous sediment deposits D) neritic siliceous sediment deposits E) pelagic biogenous calcareous deposits
The formation of a mesocyclone requires
A) vertical wind shear. B) the existence of a wall cloud. C) the presence of stratocumulus clouds. D) the presence of a funnel cloud.
Read the following paragraph to answer the question:The Mt. St. Helens eruption in Washington state in 1980 measured 5 on the volcanic explosivity index (VEI). Only 57 people died from the Mt. St. Helens since most people were warned to evacuate the area prior to the event. Four years later, in 1985, Nevado del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars.How much more volcanic material was released by the Mt. St. Helens eruption compared to Nevado del Ruiz?
A. Ten thousand times more B. A hundred times more C. Ten times more D. Twice as much