70. Define the term "particles" in the context of air or water. What is the typical size range of particles? How does this compare to individual molecules, and to the width of a human hair? 71. Describe two natural sources of particles in air, and two sources that are derived from human activities. 72. Besides advection, what are the two main ways by which particles move about? Describe how each depends on particle diameter.

Biology: The Dynamic Science (MindTap Course List)
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70. Define the term “particles" in the context of air or water. What is the typical size range of particles?
How does this compare to individual molecules, and to the width of a human hair?
71. Describe two natural sources of particles in air, and two sources that are derived from human activities.
72. Besides advection, what are the two main ways by which particles move about? Describe how each
depends on particle diameter.
Transcribed Image Text:70. Define the term “particles" in the context of air or water. What is the typical size range of particles? How does this compare to individual molecules, and to the width of a human hair? 71. Describe two natural sources of particles in air, and two sources that are derived from human activities. 72. Besides advection, what are the two main ways by which particles move about? Describe how each depends on particle diameter.
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