The dominant processes in an ecosystem are
A) life and death
B) damage and restoration
C) energy flows and chemical cycles
D) interactions of biota and geologic environment
C
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A way to grow food on steep slopes or mountainsides without depleting topsoil is called ____________________.
Fill in the blank(s) with the appropriate word(s).
Net energy is
a. the usable amount of low-quality energy from a given quantity of energy resource b. the total useful energy available from an energy resource c. analogous to total income d. the total useful energy from an energy resource minus the amount of energy used and wasted in producing it e. the amount of energy used and wasted to produce useful energy
Paleozoic paleogeographic reconstructions are based primarily on ____
A)magnetic anomalies B)volcanic rocks C)metamorphic assemblages D)structural relationships E)transgressive sequences
A particular reaction has an equilibrium constant of 1 x 10-15. Which of the following best describes the relationship between the equilibrium constant and the reaction rate?
A) Because the equilibrium constant is small the reaction proceeds slowly. B) There is no relationship between the size of the equilibrium constant and the rate of the reaction. C) Both a and b are true. D) Neither a nor b is true.