What is the most direct way to determine if a mineral is probably calcite?
a. Hold a magnet to the mineral. If you feel a pull, the mineral is calcite.
b. Drop dilute hydrochloric acid on the mineral. If it effervesces, it is probably calcite.
c. If the mineral has cleavage in three directions, then it is calcite.
d. Drop dilute hydrochloric acid on the mineral. If it does not effervesce, it is probably calcite.
e. If the mineral has a conchoidal fracture, then it is calcite.
b. Drop dilute hydrochloric acid on the mineral. If it effervesces, it is probably calcite.
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In addition to glaciers melting and the oceans acidifying, what other indicators are there of climate change?
A. Birds in the northern hemisphere have expanded their ranges northward. B. Birds in the southern hemisphere have expanded their ranges northward. C. Plants have expanded their range down mountain slopes. D. Bees have expanded their range in the direction of the equator.
Since 1975, the Earth's average atmospheric temperature has risen about _____ degree(s) Fahrenheit. To answer, use text and not a number. For example, use "five" and not "5".
Fill in the blank(s) with the appropriate word(s).
The "Rose Revolution" transpired in what country in 2003?
A. Russia B. Georgia C. Kyrgyzstan D. Belarus
Calculate the change in sea level (in km) if the ice sheets melted, and
write your result below (see sidebar). What will be an ideal response?