The Hydrosphere


Video Study Guide: Your Diet: Water (FB1035; 10 minutes)


Which way does water flow?


Why is water called the source and matrix of life?


How much water is in the average human body?


How much water should a healthy person drink each day?


How long can you survive without food? How long without water?


How does water work to cool our bodies?


Why can soft drinks be harmful to people with high blood pressure?


What is caffeine, and what can too much of it cause?


What minerals does "hard" water contain?


Why do some cities add fluoride to their water supplies?


How can good health be enhanced?


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