A digitized map from a secondary data source such as a USGS quadrangle map is subject to more location errors than a primary data source. Why?
What will be an ideal response?
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For most streams, bank full discharge occurs
A) daily. B) about once per month. C) about once every 2 years. D) about once every 75 years.
Which of the following forms different layers from season to season and can be used to determine how many years the layers represent?
A. varves B. tree rings C. layers in ice cores D. All of these choices are correct.
Residence time is the ________
A) average length of time a molecule of a substance spends in the environment B) length of time it takes for chemicals to be stored in the tissues of living organisms C) chemical change that occurs with time, when substances alter the growth and development of humans D) chemical change that occurs with time, when substances are altered by the sun or metabolized by microorganisms E) length of time it takes to produce toxic chemicals in the environment
As student doing a titration of HNO3 with sodium hydroxide wanted to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?
A) The concentration of HNO3 will be reported as too high. B) The concentration of HNO3 will be reported as too low. C) The concentration of HNO3 will be reported correctly. D) The experiment cannot be done at all.