The time that it takes one complete wave to pass a fixed point is the _______________ of the wave
Fill in the blank with correct word.
ANSWER: period?
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Soil erosion is a natural process in undisturbed ecosystems.
Answer the following statement true (T) or false (F)
Ocean sediments and volcanoes are sources of:
a. Nitrogen b. Oxygen c. Sulfur d. Phosphorus e. both sulfur and nitrogen
Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion?
A) addition of an electrolyte B) dilution of the system by addition of water C) both a and b D) neither a nor b
In areas where the daily temperature regularly varies above and below the freezing temperature of water, the freeze-thaw cycle ________.
A. promotes the opening of cracks and joints in rock that may lead to rock falls B. facilitates soil creep C. facilitates rock weathering D. Both facilitates soil creep and facilitates rock weathering are correct. E. All of the choices are correct.