Most of an iceberg is under water because ________
A) the mass of an iceberg is concentrated in the zone of wastage
B) ice is more dense than seawater
C) the mass of an iceberg is concentrated in the zone of accumulation
D) seawater is more dense than ice
D
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What human activity commonly separates a longshore current from its sediment supply?
A. Removal of artificial levees B. Removal of dams C. Dredging D. Removal of seawalls and jetties
Which of the following is true of agricultural land in North America?
A) Today, agricultural land continues to increase B) Today, agricultural land continues to decrease C) Today, growing forests are being replaced by agricultural land D) Food production continues to decrease in the last 50 years E) Most of the wheat and oats used on this continent is imported from Europe
Despite their instability, over 70 barrier islands off the United States have been commercially
developed. Indicate whether the statement is true or false.
The increase of temperature with depth is known as the ____________________. Fill in the blank(s) with the appropriate word(s)