The pervasive alteration of global ecosystems is mainly the result of
A) global climate change.
B) increased frequency of wildfires in the past 500 years.
C) human activities.
D) the movement of continents by plate tectonics.
C
You might also like to view...
Within which range of latitudes in the Northern Hemisphere is 24 hours of daylight experienced?
Figure 9-2: Earth–Sun relations on June solstice.
Noting the orientation of the circle of illumination on June 21, explain the above question.
What will be an ideal response?
Uranium fuel is ________ before it can be put into a reactor.
A. Produced by bombarding it with electrons from radioactive plutonium B. Extensively processed to clean and purify it C. Extensively processed in order to change it to a safer form D. Found in concentrated form in the Earth and then washed E. None of these is correct
Dark energy bends the curvature of spacetime
A) in the exact same fashion as gravity. B) in the opposite manner of gravity. C) by absorbing all lightwaves that pass through it. D) Dark energy does not bend the curvature of spacetime.
Of the regions of the United States, which has the highest incidence of tornadoes?
A) New England B) Hawaii C) West Coast D) Florida E) Central States