A group of waves is propagated at a speed that is ________ the speed of the individual waves in deep water.
A. twice
B. one-half
C. one-quarter
D. the same as
E. one-tenth
Answer: B
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In which of the following countries are French and English the official languages?
A) Canada B) Mexico C) Australia D) France E) Ivory Coast
An example of a proxy record used by paleoclimatologists is:
A) tree ring growth. B) plant leaf shapes. C) oxygen-isotope ratios in calcite secreting plankton. D) all of the above.
If a population of lemmings grows fast during a productive winter and shoots beyond the carrying capacity the population will ________
A) quickly crash back below the carrying capacity B) continue to grow just as quickly C) revert to logistic growth D) continue to grow but in an S shape E) slowly return to below the carrying capacity
Which of the following is NOT a way in which volcanic domes are commonly destroyed?
A. collapse into emptied magma chambers below B. internally derived explosions from built-up gas pressure C. collapse of steep flanks into block and ash flows