Explanation:
Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
When this vapor hits cooler air it changes back to its liquid form and creates clouds. When so much of the water vapor has condensed and the clouds are heavy, the liquid falls back down in the form of precipitation.
Answer:
Explanation:
The cold air mass is moving to replace the warmer air mass. This happens because the warm air is lighter than the cold air. The clouds form at the cold front because as the warm air rises, it cools and moisture in the air condenses.
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Answer:
The given statement is True
Explanation:
Generally, basin and range areas of the world are mostly the direct outcome of the geological factors that underlie most notably -tectonic extensions. These have started 17 million years back and are the outcome of lithosphere and earth crust being pulled apart due to tectonic movement. By the passage of time with progressive crust movement, it became stretched and thinner to a point where fracture can occur due to faults. Such faults are the outcome of normal faults. Western United States have a vast region covering its inland which is characterized by abrupt elevation changes, varying between flat arid basins to faulted and narrow chain of mountains.
