One of the natural services provided free by the Earth is the purification of water. Exactly how does this work? Be sure to explain the role of the energy source and other force that drives this process.
What will be an ideal response?
This natural service is powered by the sun and the force of gravity. When water is evaporated, the dissolved chemicals (i.e., natural or human pollutants) are left behind either in a dissolved or solid state. The water vapor rises, eventually condenses, and forms rain droplets. Due to the action of gravity, it falls back to the earth as purified water. The action of gravity is also responsible for groundwater flow which acts as a natural water filtering process.
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The presence of natural hazards is a primary influence in people's place perception.
A. Yes B. No
The majority of earthquakes and volcanic activity occur along plate boundaries
a. True b. False
The U.S. already has at least one underground storage site for transuranic waste. Indicate whether the statement is true or false
When a hurricane poses a direct threat to an area, a hurricane ____________________ is issued. When it appears that the storm will strike an area within 24 hours, a hurricane ____________________ is issued
Fill in the blank with correct word.