What are the three categories of UV radiation? Which of these are considered to be biologically harmful?
What will be an ideal response?
The three types of radiation are UVA, UVB, and UVC. UVB and UVC radiation are biologically harmful, but only UVB radiation has dangerously high surface fluxes.
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A loss of 15% of _____ would cause a one meter rise in sea level that would threaten millions of people and cause trillions of dollar of damage to coastal areas
a. the Antarctic ice sheet b. the Arctic ice sheet c. inland glaciers in Alaska d. Greenland's ice sheet e. Iceland's ice sheet
Surface currents are traced using a(n) ____.?
A) ?echo sounder B) ?Argo system C) ?drift bottles D) ?chemical tracer
Currently, desert and steppe lands cover about what percentage of Earth's land area?
What will be an ideal response?
Which event is best represented by the hydrograph shown here?
A. a very long period of steady light rain B. a winter snowstorm followed by very cold weather C. a summer thunderstorm D. a long drought with no rain for months