Water Systems What is Water Review From Last

Water Systems What is Water?

Review From Last Class § How much water do you use? § Suggest ways in which you could reduce water consumption.

How are we doing? § Today, around 3 800 cubic kilometres of fresh water is withdrawn annually from the world's lakes, rivers and aquifers. This is twice the volume extracted 50 years ago § A 5 -minute shower with a standard shower head uses 100 litres of water § A single lawn sprinkler spraying 19 litres per minute uses more water in just one hour than a combination of ten toilet flushes, two 5 -minute showers, two dishwasher loads, and a full load of clothes

§ Canada is the largest producer of hydroelectricity, followed by the United States and Brazil § Landfills, leaking gasoline storage tanks, leaking septic tanks, accidental spills and farm land treated with pesticides and fertilizers are a few examples of how we are treating our precious groundwater § One drop of oil can render up to 25 litres of water unfit for drinking

§ http: //videos. howstuffworks. com/bp-oil-spillvideos-playlist. htm#video-40856 § http: //www. teachersdomain. org/resource/es s 05. sci. ess. watcyc. exxon/

So what do we do? § Conserve § Stop pollution § Any other suggestions? ?

What is Water? The Water Particle

Demo: Which would you drink? § Look at the 2 glasses of water – which one would you drink? § Do you think that this is pure water? Why or why not? § Water is a mixture since there are other substances that are odourless and colourless in it that we cannot see (eg. Floride and sodium).

Distilled Water § Try This!