WorksheetsWater quality, water treatment, and NC River basins
Total questions: 20
Worksheet time: 42mins
What is Dissolved Oxygen?
Amount of carbon dioxide that is mixed into water
Oxygen that is inside of a hollow object
Amount of oxygen that is mixed into water
When you breathe in air
What is dissolved carbon dioxide?
Amount of carbon dioxide that is mixed into the water
When a plant takes in carbon dioxide
How much carbon dioxide is inside a plant
When you breathe out carbon dioxide
What are nitrates and phosphates?
Two aquatic species that are commonly found in large bodies of water
Nitrates are how acidic the water is
Phosphates are how basic the water is
Nutrients that can build proteins. Chemical forms of nitrogen and phosphorus
Which is better for drinking
Very acidic water
Very basic water
Neither of those answers
Water with a pH of 7
If there is a high value of bio-indicators, what does that tell you about the quality of the water
The water is healthy and there is a good amount of dissolved oxygen
The water is healthy and there is a high amount of dissolved carbon dioxide
The water quality is bad
The water quality is really bad
Nitrates and phosphates, turbidity, and dissolved oxygen are all related in a water system
True
False
The amount of dissolved oxygen in water is dependent on the (a) of the water.
Select the water treatment steps
Coagulation
Disinfection
Sedimentation
Filtering
Fertilize
Select all that applies about water
It is a universal solvent
Ice is denser that water
Pure water has a pH of 7
Water has a low specific heat index
Water has a very high surface tension
What does cohesion mean?
Cohesion means that water molecules stick to other materials
Cohesion means that water molecules stick to each other
Cohesion means that the water has the ability to move upward against gravity
Cohesion means that the water can absorb a lot of heat before it gets hot
What does adhesion mean?
Adhesion is when water is very acidic
Adhesion means that the water molecules stick to each other
Adhesion is when the ice is less dense then the water
Adhesion means that the water molecules are able to stick to other materials
Bugs are able to walk/float on water because of (a) . This is defined as a thin ¨skin¨on top of water due to the water molecules sticking together.
What river basin does Chapel Hill fall into?
Rocky River
Cape Fear
Deep River
Haw River
Pollution that you can easily point out where the pollution is coming from, is called...
(a)
If there was an excessive amount of nitrates and phosphates in a water system. What would change in the water. (Select all that apply)
It can create algal blooms
Dissolved oxygen levels will increase
Dissolved oxygen levels will decrease
Turbidity levels increase
Everybody lives in a watershed
True
False
What is pH?
How acidic or basic the water is
The amount of calcium in the water
The amount of magnesium in the water
Measure of how clear the water is
If you treat your environment poorly, then your water shed will not have clean water
True
False
What percent of Earth´s water is available for human use?
20%
7%
1%
3%
Imagine this scenario. You live in a small city that is located at the bottom of a very large hill. At the top of that hill, there is a very big city with many cars, factories, and the people there throw away their trash wherever they want. How does the big city affect your drinking water?
It does not affect my city. Polluted water that flows downstream naturally cleans itself and gets rid of every bad thing that is in the water
All of the pollutants from the big city pollute their water. Then, the polluted water flows downstream into your small city and pollutes your water
It does not affect my city because water does not flow in the direction of the incline
