3/14/12 A/B DayLEQ: 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.

Let’s Review!

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

Focus Vocabulary:

136. Natural Resource 137. Desalination138. Dissolved Oxygen139. Point-source pollution140. Non-Point source pollution

Activating StrategyYou 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?

Ms. Lorant’s Deserted Island List:

1. Water purifier2. My bed3. A waterproof laptop with internet access4. Lifetime supply of Cookout cheeseburgers5. War and Peace (a 2,000 page book)

Three things every living thing CAN’T live without:

The hydrosphere gives us ALL THREE!!!

How do we use water as a natural resource?

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

How do we use water as a natural resource?

Air: Water: Food:

How do fish breathe underwater?

BrainPop: Gills

AIR:-There is dissolved oxygen in water!

Where does the oxygen in water

COME from?

BrainPop: Algae

Chemical Reaction: Photosynthesis

CO₂ + H₂O C₆H₁₂O₆ + O₂

Carbon Dioxide

Water

Glucose (plant food)

Oxygen!

What are the reactants?What are the products?

AIR:-There is dissolved oxygen in water!-Algae photosynthesis puts oxygen into the water and the atmosphere

Sunlight + Carbon Dioxide Energy +

Oxygen!!!!

Photosynthesis

What do you think would happen if the algae in the hydrosphere went extinct? NO MORE

OXYGEN!!

Hot Q:

WATER: -97% of our water is salty

-Desalination: process of separating salt from ocean water

Discovery Education: Desalination

What are some of the pro’s of desalination?

What are some of the con’s of desalination?

FOOD:

-75 million TONS of ocean fish are eaten by humans each year

-we eat fish, shrimp, oysters, crabs, mussels, lobsters, seaweed, and kelp

Seaweed in WHAT?carrageenan

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?

Animal Waste in our Water Supply: • http://scorecard.goodguide.com/env-releases/aw/n

c-hog-campaign.tcl

Discovery EducationFrontline: Poisoned Water

Draw this in your notes:Point-Source Pollutant

Non-Point-Source Pollutant

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

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

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

BOTH:

• Are caused by humans

• Can contaminate our water supply

Point-Source Non-Point-Source

?

Point or Non-Point?

Fertilizer from miles and miles of farmland runs off and pollutes a river

Point or Non-Point?

A Nike shoe factory buries a crate of toxic waste.

Point or Non-Point?

Hundreds of 18-Wheelers release several tons of particulate matter into the air

Point or Non-Point?

A factory smokestack pours several tons of greenhouse gases into the air

Point or Non-Point?

A person throws garbage onto the side of the road

Point or Non-Point?

Acid rain infects a city’s water supply

Gallery Walk:

This is a ________________ because _________.

• 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

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?

Identifying Point- and Non-Point-SourceDraw this in your notes:

Point-Source Non-Point-Source