What percent of the earth's surface does the ocean cover? a) 21%
b) 50%
c) 75%
d) 78%

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

In the diagram below, ab and bc are tangent to o. what is the measure of

As water is cooled from 4 c to 0 c its density