Water Study Guide

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22 Φεβ 2014 (πριν από 3 χρόνια και 6 μήνες)

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Water Study Guide

Properties of water

For 1
-
7, i
dentify the term being described in each statement.

1.

A water molecule having different charges on each end

2.

Ability of water to make a drop by sticking to other water molecules

3.

Ability of water to dissolve
most substances

4.

Ability of water to stick to the car window

5.

Term used to describe that water is a chemically combined substance of at least two elements

6.

An example of cohesion that allows insects to glide on water

7.

An example of adhesion that allows water t
o go up a straw


8.
Which has a lower density: ice or liquid water?


9.
Does water have a high specific heat or a low specific heat?


Distribution of water

10.
What percentage of water on Earth in saltwater?


11.
Where is most freshwater found?


12.
What
did the tiny little drop represent in the water lab?


13.
Name two sources of fresh water used by cities for drinking water.


Water cycle

14.
Draw a picture representing the water cycle. Be sure to label the following steps: evaporation, condensation,
precipitation, percolation, and runoff.

















Water pollution

15.
Define the terms point
-
source and non
-
point
-
source pollutants.



Identify the following examples as a point
-
source or non
-
point
-
source pollutant.

16.
Accidental release of sewage
from the wastewater treatment plant


17.
Oil leaking from an underground tank


18.
Trash floating in ocean water


19.
Chemical runoff from lawns and roads



Water Quality

20.
What is the minimum DO level necessary to keep fish and other organisms alive?


21.
Name two sources of nitrates. How do they end up in the water?


22.
Describe what will happen in a lake where the nitrate level has gone up.


23.
What temperature of water supports the most life?


24.
What type of pollution affects the temperature of
the water?


25.
Define turbidity.


26. Describe why high turbidity is unhealthy for a body of water?


27. What scale is used to measure acids and bases? On which end do we find acids and which end bases?


28. Name the term described by a population of
living organisms studied to determine water quality.



Wastewater Treatment

29.
Put the following steps in the correct order by labeling them with numbers
1
-
5.

____ Chlorine is added.

____ Large particles are removed using screens.

____
Extra

chlorine is removed.

____ Water is mixed with bacteria and oxygen
.

____ Smaller particles settle out.


30.
What is the job of the bacteria that is added to the water?


31.
Why is the water treated with chlorine?

Water Treatment

32.
Put

the following steps

in the correct order by labeling them with numbers 1
-
6.


___ Sedimentation


___ Distribution and Storage


___ Coagulation and Flocculation


___ Disinfection


___ Pre
-
treatment and Screening


___ Filtration


33. During disinfection, two chemicals are added

to the water. What are they and what are their purposes?


34. During coagulation and flocculation, alum is added. What is its purpose?


Surface water ecosystems

In seven words or less, write a description of e
ach of the following ecosystems in 32
-
37.

32.
Lake


33.
Pond


34.
Reservoir


35.
River


36.
Stream


37.
Wetlands



38.
Name two important uses of wetlands.


39.
Name two important uses of reservoirs.



Groundwater

For 40
-
44, i
dentify the term being described in each statement.

40.
Rock layer that
stores water underground


41.
Level of the water underground


42.
Measure of open space between rocks


44.
Measure of whether water can flow through rock


45.
What might cause a well to run dry?


46.
What causes a sinkhole to form?