What was once an open pasture on a long-abandoned farm has changed over time, without the direct influence of humans. After the cattle had been removed, shrubs and bushes could be seen dotting the grass-covered hillsides
A few years later, small pine trees and then larger deciduous trees appeared. Now, there are so many trees and shaded regions that it is difficult to tell that this was once a field. The ecological changes in this abandoned pasture represent ________.
A) primary succession B) secondary succession
C) disturbances D) resilience events
B
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The volume of water that a stream carries per unit of time is its discharge
Indicate whether the statement is true or false.
Christopher Columbus was the first person to discover the "New World". Indicate whether the statement is true or false
With all of the sun's energy striking the Earth every second of every day, why doesn't the Earth overheat and kill all life living on it?
A) The Earth is so large and dense that it absorbs all of this heat.
B) The Earth is overheating regionally, melting rocks into the lava of volcanoes.
C) The Earth maintains a balance by radiating this heat back into space.
D) The atmosphere of the Earth prevents the solar radiation from reaching the Earth's surface.
The boiling point of water occurs at:
A) 273 K. B) 100°C. C) 200°F. D) 212°C.