LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which provides the clearest evidence of climate change?
A
Fossils of early reptiles are found in North Carolina.
B
Valleys in California were carved by massive glaciers.
C
Rocks in California reveal a history of past earthquakes.
D
Mountains in North Carolina have been weathered over time.
Explanation: 

Detailed explanation-1: -Worldwide, most glaciers are shrinking or disappearing altogether. Relative to 1970, the climate reference glaciers tracked by the World Glacier Monitoring Service have lost a volume of ice equivalent to nearly 25 meters of liquid water-the equivalent of slicing 27.5 meters of ice off the top of each glacier.

Detailed explanation-2: -Glaciers provide the most visible evidence of climate change. In California, most glaciers are found in the Sierra Nevada above 10, 000 feet in elevation, from Yosemite National Park in the north to Sequoia National Park in the south.

Detailed explanation-3: -The most apparent evidence is of course the glacial drift itself. Glacial drift refers to the rock material ground up and transported by a glacier and deposited by or from the ice (till) or in water derived from the melting of ice (outwash or lake sediment).

Detailed explanation-4: -More evidence comes from glacial striations – scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves. These show the direction of the glacier, and suggest the ice flowed from a single central point.

There is 1 question to complete.