Answer:
A.
Explanation:
Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
Answer: Which examples represent abiotic factors affecting biotic factors are: B. Ash from a volcanic eruption kills new plant growth. D. Warm water from a nuclear power plant causes overgrowth of algae. E. a river floods and deposits tree pollen along its banks.
Answer:
Short Answer: Uplift and Erosion activities
Explanation:
Let's understand this briefly,
Name/Type - Grand Canyon (deep gorge)
Location - Northern Arizona (USA)
Formation - About 6 millions years ago
How - When the river (Colorado) started to cut channels through layers of sedimentary rocks
Formation Process - Weathering and Erosion
Forces which acted - Wind, Precipitation, Streams and snowmelt
Depth - 1830 m
According to question,
It is formed due to tectonic uplift in the region and due to vast erosion activities affected by enormous number of factors.
<span>The best answer is (d) water from snowmelts. The American Southwest has many mountains that catch moist air moving westward (from the Pacific) that falls as snow during the winter. The snow melts gradually during the spring and summer when there is little precipitation. The melted snow runs off the mountains into rivers and streams that can be tapped by irrigation pumps. The snowmelt also sinks into the ground, replenishing underground aquifers that can be tapped by wells in the valleys where farming takes place.</span>
