What moves through the community from one trophic level to another as organisms feed on one another?
a. water and energy
b. matter and energy
c. matter and water
d. disease and parasites
Answer: b. matter and energy
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Which of the following best describes natural laws?
A) They are assumed by scientists to operate in the same way throughout the universe. B) They have gradually and spontaneously changed over long periods of time. C) They have been changed several times as the result of experimental data. D) They apply to matter but not to energy.
Acetic acid, CH3COOH, is a stronger acid than the ammonium ion, NH4+. When acetic acid reacts with ammonia, NH3, what species are present in the solution in the largest amount?
A) acetic acid, CH3COOH and ammonia, NH3 B) acetic acid, CH3COOH, and ammonium, NH4+ C) acetate ion, CH3COO-, and ammonia, NH3 D) acetate ion, CH3COO-, and ammonium ion, NH4+
Which of the following is not part of the water cycle?
A) water evaporating from a lake B) calcium carbonate dissolving in soil water and groundwater C) water moving into creeks and streams following a rainstorm D) water infiltrating into the soil and bedrock
When magma or lava cools, the result is ________
A) weathering and deposition B) subduction C) metamorphic rock D) igneous rock E) the formation of minerals