Why is the velocity of valley glaciers slower along valley walls than in the center of the glacier? What will be an ideal response?


Because there is more friction where the ice is in contact with the rocks.

Environmental & Atmospheric Sciences

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Which numbered area on this geologic map of North America would contain the oldest rocks exposed at the surface?

A. 1, southern Alaska B. 2, continental platform of west-central Canada C. 3, continental shield of eastern Canada D. 4, coastal plain along the Gulf Coast of the U.S.

Environmental & Atmospheric Sciences

Which of the following is not the molecular formula of an alkane?

A) C15H32 B) C19H40 C) C20H42 D) None of them, these are all alkanes.

Environmental & Atmospheric Sciences

Water has more than one freezing point

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The North America Act of 1867:

A) dissolved the colonial status of the United States B) dissolved the colonial status of Canada C) dissolved the French claims to the Louisiana Purchase D) abolished slavery in Canada E) created a nationwide immigration quota system in the United States

Environmental & Atmospheric Sciences