Compare and contrast regression and transgression. What sea level changes do these geologic sequences imply? What
could cause these changes? Give specific examples of regressive and transgressive sequences. What will be an ideal response?
The student should recognize that regressions imply a period of falling sea level in which the
ocean recedes from the continent. By contrast, a transgression implies a period of rising sea
level in which oceans cover more of the continental masses. These changes can be caused by
climatic or tectonic factors. A good example is the lowering of sea level that accompanies an
ice age when more water is contained as ice in glaciers and ice sheets resulting in lower sea
level.
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Whales that die and fall to the depths of ocean are consumed by giant isopods. These relatives of the common roly poly (or pill bug) grow about a foot in length and are about the size of a football. Which type of aquatic organism is this creature?
A. decomposer B. producer C. consumer D. plankton
If you had a 1 M solution of a weak acid what would be its pH?
A. 8 B. 7 C. 13 D. 6 E. 0
The major pathway for energy production at hydrothermal vents is ____________ Fill in the blank(s) with the appropriate word(s)
What community has the highest biomass per unit of surface area?
a. Rocky intertidal b. Estuary c. Sandy beach d. Deep ocean