Briefly explain why apparent polar wandering is "apparent". What will be an ideal response?
Paleomagnetic studies of ancient rocks point to different locations for the north pole at different times.
When this is mapped out, it makes the pole appear to wander over time. The alternative to a wandering
magnetic pole, for which there is no other evidence at all, is that the continents move and, with them,
the rocks that contain the paleomagnetic data.
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Which of the following toxic gases was an important component of London's smoke fogs?
A. radon B. sulphur dioxide C. carbon monoxide D. ozone
Comment on the accuracy and usefulness of the atmospheric calcium additions calculation that was conducted according to Gile and Grossman's dust trap experiment
A) The data and hypothesis were extremely accurate and useful. B) It was perhaps not very accurate, but nonetheless a useful hypothesis. C) It was not an accurate calculation, and therefore not that useful. D) The calculations were very accurate, but not useful because the hypothesis was not clear.
What type of cleavage is illustrated in this figure?
A. three nonperpendicular directions B. two nonperpendicular directions C. two perpendicular directions D. one direction E. three perpendicular directions
A fault along which rocks move up or down is called a ____
a. joint-slip fault b. strike-slip fault c. dip-slip fault d. down-slip fault e. lateral fault