Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
2.3 Water shortages threaten society BY: Austen Lehrke and Izack Ohman
A video on droughts http://video.nationalgeographic.com/video/player/environment/environment-natural-disasters/landslides-and-more/droughts.html Droughts are caused when there is a lack of rain over along period of time. Fresh water animals are disappearing 5 times faster than land animals. Most of worlds people must walk at least 3 hours to fetch water.
Pollution Pollution is a waste material that pollutes the air, water or soil. Three factors determine the power of a pollutant, its chemical nature, the concentration and the persistence. Each day almost 10,000 children under the age of 5 in the third world countries die as a result of polluted water.
The need for conservation The growing human population is continuously increasing the stress on the forest for wood products including fuel for cooking building, and heating. This is a picture of a dude conserving the forest. https://www.youtube.com/watch?v=tnFi_T-L13E
Overuse can cause water shortages In China there is a lot of water shortages because they overuse it by letting it run or just leave it on when they’re not even near it. https://www.youtube.com/watch?v=Vg84jlWEGEI
https://www.youtube.com/watch?v=rlbRPrPZjZo&feature=related New Sources Do you think people can find a new source in fresh water? Well people think you could just take the salt water out of it but you really can’t find a new source in fresh water.
2/3 of earths surface consists of water. 3% of earth’s water is drinking water. 97% of the total water on earth is salt water. While 3% of earths water is fresh water. Out of that 3% less than 1% is fresh drinking water while the other 2% is frozen in ice caps.
*It takes 1,500 gallons of water to process one barrel of beer. *It takes 120 gallons of water to produce of egg. *About 6,800 gallons of water is needed to produce food for a family of four for one day. *It takes 1,850 gallons of water to refine one barrel of oil.
Experiment Adjust a water faucet so that it will drip water slowly. Set a container underneath the faucet and collect the dripping water for 5 minutes. Turn off the faucet. Then use the graduated cylinder to measure how much water dripped. Multiply the amount by 12 to determine how much water would drip in one hour. Then divide it by 1000 to convert it to liters.
Assignment Read chapter 2.3 Do key concepts Define vocab words