According to the article about coral reefs, which of the following problems is threatening the world’s reefs today?
a.
heavy winds
b.
freezing air temperatures
c.
rising sea temperatures
d.
lower pollution

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

Does water only take one path through the water cycle? (15 points)

What happens to rock when acid reacts with it?