The document discusses how water is a natural resource and how it provides food, air, and water for living things. It examines point-source and non-point source pollution, where point-source pollution comes from a single identifiable source and non-point source pollution comes from diffuse sources. The focus is on human impacts to water resources through pollution and how to protect this natural resource.

1. 3/14/12 A/B Day
LEQ: How do we use water as a natural
resource and how can we protect it?
1. What is a food web?
2. What is a an example of how an aquatic and a
terrestrial food web can be interconnected?
3. What is an example of an organism you would
predict to find in the FIRST trophic level?
4. What is an example of a primary consumer?
5. Copy and complete: The higher up the food
chain, the [higher/lower] amount of energy is
transferred.

2. Let’s Review!

3. Today’s LEQ: How do we use water as
a natural resource and how can we
protect it?
By the end of today, you should be able to…
1. Describe how we use the hydrosphere for
food, water, and air
2. Distinguish between point- and non-point-
source pollutants
3. Describe the pro’s and con’s of using
chemicals in our hydrosphere

4. Focus Vocabulary:
136. Natural Resource
137. Desalination
138. Dissolved Oxygen
139. Point-source pollution
140. Non-Point source pollution

5. Activating Strategy
You are going to be living on a deserted island for the
rest of your life—you can’t escape from the island (no
matter what you bring!) and you can only take 5
things with you. What would you bring?

6. Ms. Lorant’s Deserted Island List:
1. Water purifier
2. My bed
3. A waterproof laptop with internet access
4. Lifetime supply of Cookout cheeseburgers
5. War and Peace (a 2,000 page book)

7. Three things every living
thing CAN’T live without:

8. The hydrosphere gives us
ALL THREE!!!

9. How do we use water as a
natural resource?

10. Think-Pair-Share:
What is a natural resource?

11. How do we use water as a
natural resource?
Air: Water: Food:

12. How do fish breathe underwater?

13. BrainPop: Gills

14. AIR:
-There is dissolved oxygen in water!

15. Where does the
oxygen in water
COME from?

16. BrainPop: Algae

17. Chemical Reaction: Photosynthesis
What are the reactants?
What are the products?
CO₂ + H₂O  C₆H₁₂O₆ + O₂
Water Oxygen!
Carbon Glucose
Dioxide (plant food)

18. AIR:
-There is dissolved oxygen in water!
-Algae photosynthesis puts oxygen into
the water and the atmosphere
Photosynthesis
Sunlight + Carbon Dioxide  Energy +
Oxygen!!!!

19. Hot Q:
What do you think would happen if
the algae in the hydrosphere went
extinct? NO MORE
OXYGEN!!

20. WATER:
-97% of our water is salty
-Desalination: process of
separating salt from ocean
water

21. Discovery Education: Desalination
What are some of the
pro’s of desalination?
What are some of the
con’s of desalination?

22. FOOD:
-75 million TONS of ocean fish
are eaten by humans each year
-we eat
fish, shrimp, oysters, crabs, muss
els, lobsters, seaweed, and kelp

23. Seaweed in WHAT?
carrageenan

24. How Humans Affect Water:
1. What do we call something that can
contaminate or infect our water?
2. What is the difference between a point-
source pollutant and a non-point-source
pollutant?
3. How can pesticides and fertilizers pollute
our water supply?
4. What are some of the pro’s and con’s of using
chemicals that can infect our water?
5. What can you do to help keep our water
clean?

25. Animal Waste in our Water Supply:
• http://scorecard.goodguide.com/env-
releases/aw/nc-hog-campaign.tcl

26. Discovery Education
Frontline: Poisoned Water

27. Draw this in your notes:
Point-Source Non-Point-Source
Pollutant Pollutant

28. SORT THESE!
-pollutant that is often hard to identify
where it comes from
-pollutant that comes from a single point
-pollutant that is easy to identify the
source
-pollutant that can come from many
different sources
-ex. Acid Rain
-ex. An oil tanker spills oil into the ocean

29. Point-Source Pollutant:
• Pollutant that comes from a
single point
• Pollutant that is easy to identify
the source
• Ex: an oil tanker spills oil into
the ocean

30. Non-Point-Source Pollutant:
• Pollutant that is often hard to
identify where it comes from
• Pollutant that can come from
many different sources
• Ex: Acid Rain chewing and
contracting of stomach muscles

31. BOTH:
• Are caused by
humans
• Can contaminate
our water supply

32. Point-Source Non-Point-Source
?

33. Point or Non-Point?
Fertilizer from miles and miles of farmland runs
off and pollutes a river

34. Point or Non-Point?
A Nike shoe factory buries a crate of toxic waste.

35. Point or Non-Point?
Hundreds of 18-Wheelers release several tons of
particulate matter into the air

36. Point or Non-Point?
A factory smokestack pours several tons of
greenhouse gases into the air

37. Point or Non-Point?
A person throws garbage onto the side of the road

38. Point or Non-Point?
Acid rain infects a city’s water supply

39. Gallery Walk:
This is a ________________ because
_________.

40. • Damaged pipe dumps wastewater into a river
• Raw sewage is accidentally released into a lake
• Chemicals from a paper company are dumped
into tributary
• Sewage from a home is poured directly into a
water system
• Chemicals from fertilizers in agricultural fields run
off into the hydrosphere
• Dirty water from city streets is washed into the
ocean
• Fish are contaminated with mercury from
factories that burn coal
• Acid rain

41. Summarizer:
1. Describe how we use water as a natural resource
for food, air, and water.
2. How does human activity cause pollution in our
hydrosphere?
3. Would you rather be in charge of fixing a point-
source pollution problem or a non-point solution
problem?
4. Explain your answer to #4!
5. What are some of the pro’s and con’s of having
agriculture in North Carolina?

42. Identifying Point- and Non-Point-Source
Draw this in your notes:
Point-Source Non-Point-Source