Why are smaller nuclei such as carbon-14 often radioactive? (Carbon-12 is the most common and most stable form of carbon.)
A. The attractive force of the nucleons has a limited range.
B. Hmmm... mysterious are the ways of the force.
C. The isolated neutron is not stable and will undergo spontaneous transformation into a proton and an electron.
D. both A and B
E. none of the above
Answer: C
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Three dimensional effects are best obtained with ________.
A. Thermal scanners B. Ultraviolet photographs C. Color infrared photography D. Vertical aerial photographs E. None of the above
During the climatic optimum, alpine glaciers began to advance down river valleys
a. true b. false
What is the special property of the mineral halite?
A. It has an extremely high melting temperature. B. It has a hardness of -3. C. It tastes like salt. D. It can transmit electricity. E. It has 5 directions of cleavage.
In the shorelines investigation, what shoreline process is likely occurring at the cliffs along the western coast (left side of island)?
A. formation of a spit and sand bar B. erosion of bedrock along the shoreline C. subsidence of the land relative to sea level