Unit 1: Section A Summary

Unit 1: Section A Summary

1.    No, it does not. Drinking packaged fruit juice actually uses up more water than drinking a the tap. Water is necessary for the fruit to grow, to create the glass of water from containers, to process the juice, and to transport to stores. Although drinking juice may not seem like a major usage of water, it really does affect the water supply.

2.    Water is used to grow the grains needed to make bread, to power the machines if the bread is made in a factory, and is used in the transportation of the bread.

8.    The amount of water used has definitely increased during the amount of time the earth has been around. Increases in technology call for more water in order to power these machines. Also, the interest in personal hygiene compared to earlier centuries has created even more use for water. Lastly, the amount of humans on earth consuming water is certainly a larger number than a few hundred years ago.

9.    1) Oceans, 2) glaciers, 3) water vapor, and 4) rivers.

10.    If you were in the middle of ocean, you would be surrounded by undrinkable water. The water found there is way too salty and unpurified. Unless there were purifying tools on deck, the water source surrounding you would be useless.

11.    In my U.S. region 77% of our water is used for irrigation and agricultural purposes.

12.    a) 0.059% b) 0.00025%

13.    It is possible because new water is not created. Water simply follows the water or hydrologic cycle. Water from surface bodies of water evaporate and rise into the air. Once in the air it forms clouds and eventually will fall down as rain or snow. Then the cycle repeats itself.

17.    If both the water values are correct, than the amounts could have been from various periods of U.S. history since the amount water used then, is less than we use now.