A.8 #1-4 (pg. 22)

1. Some water usages that aren't necessary for survival are water for car washes, showers, or sprinkling the grass. 

2. Without water for drinking or cooking, we, as humans, couldn't survive, which is why this use for water is very necessary. 

3. To reduce the amount of water being used, people could take shorter showers, not wash their car as often, or turn off the sink when brushing your teeth. By turning off the water, just even by a few seconds, can help the environment and your water bill. 

4. a. An activity to use impure water could be using the water from a bath/shower and using that to wash the windows. 
    b. The water would be taken from a shower or bathtub.