The earliest known hominid fossils are from rocks that are
a. 1.5 million years old. d. 4 million years old.
b. 10,000 years old. e. 7 million years old.
c. 700,000 years old.
E
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Ocean acidification
A) threatens animals that build calcium carbonate shells. B) results from unusually warm seawater temperatures. C) is a particular issue for cartilaginous fishes such as sharks. D) is the primary cause of coral bleaching.
A "soda straw" is one type of _____.
a.) karst topography b.) stalactite c.) stalagmite d.) cavern
The amount of dissolved oxygen that seawater can hold in solution will be greater in ____
A) colder water B) warmer water C) water with a higher salinity D) water with lower pressure and density
The abrupt bulge of water driven ashore by a tropical cyclone is called a ____
A) tidal wave B) tsunami C) storm surge D) rogue wave