The types of coal include bituminous, lignite, subbituminous, and anthracite. Anthracite is the best
because it burns more cleanly and efficiently than the other types. What will be an ideal response?
It is relatively easy to distinguish between marine and terrestrial organisms, based on a comparison
with their living counterparts. Strong invertebrate shells usually indicate a high-energy environment,
such as the intertidal zone; deep-sea fossils are microscopic and fragile. Marine microfossils are
particularly important because so many can be retrieved in a single core sample. Coral reef deposits
are bounded in depth, as well as latitude, and are always marine.
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An iron paper clip is attracted
A. more strongly to the south pole of a magnet. B. more strongly to the north pole of a magnet. C. equally to either pole of a magnet. D. none of the above
What was the costliest natural disaster in U.S. history?
A. The Loma Prieta earthquake B. The Boxing Day tsunami C. Hurricane Hugo D. Hurricane Katrina
This lake is shared as a border between Austria, Switzerland, and Germany
A) Rhine B) Michigan C) Constance D) Lucerne
The following are adaptations to light (or its absence) in the dysphotic zone of the oceans except ________.
A. transparency B. dark coloring C. swim bladder D. bioluminescence E. countershading