Why has the earth experienced natural climate changes?
A. The earth has experienced natural climate changes because of rapid deforestation of the tropical rainforest.
B. The earth has experienced natural climate changes because of increased burning of fossil fuels.
C. The earth has experienced natural climate changes because of the variability in solar irradiance, as evidenced by sun spot activity.
D. The earth has experienced natural climate changes because the increased number of asteroids between the earth and the sun is blocking the amount of solar radiation the earth receives on an annual basis.
E. In cycles of tens or often hundreds of thousands of years, the earth’s tilt and its orbit around the sun gradually change. These natural changes have contributed to dramatic shifts in earth’s climate.
Ans: E. In cycles of tens or often hundreds of thousands of years, the earth’s tilt and its orbit around the sun gradually change. These natural changes have contributed to dramatic shifts in earth’s climate.
You might also like to view...
Which agent of metamorphism was primarily responsible for generating the rock in the image above?
A) Heat B) Directed pressure C) Confining pressure D) Partial melting
Optimum conditions for siting of a sanitary landfill would include:
a. clay soils and deep water table b. sandy soils and deep water table c. clay soils and shallow water table d. sandy soils and shallow water table
Air pressure decreases with increased elevation
Indicate whether the statement is true or false
Why would increasing acidity of the ocean be a problem?
A) Acid would dissolve calcium carbonate shells or sea organisms B) Acid will increase the rate of seafloor spreading C) Acid decreases the stability of basaltic rocks on the ocean floor D) Acid would be evaporated and create clouds that precipitate acid rain