GLOBAL WARMINGby Rowena Renon-Adalla

Living Environment TeacherBronx High School for the Visual Arts

Lesson Phases

Phase 1- Learning The Concepts -2 class periods• Understanding Global Warming

Phase 2- Activity- 2 class periods• Modeling, Designing and Using Temperature

Reader

Phase 3- Reflection, Feedback and Revisions- 1 day

Phase 1- Learning The Concepts

• Understanding Global Warming

Possible Aim/s: a. How does global warming work?b. What’s up with global warming?c. How does carbon dioxide emission affect global warming?

Do Now: Write at least three questions about the diagram/picture.

What is global warming?

How Global Warming Works

Fossil fuels (coal, oil, natural gas)

Carbon Dioxide (CO2)

The Sun’s energy passes through the car’s windshield.

This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.

Example of the Greenhouse Effect

What’s the difference between “global warming” and

“climate change”?

DifferenceGLOBAL WARMING

is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere.

CLIMATE CHANGE is a broader term that

refers to long-term changes in climate, including average temperature and precipitation.

Effects of Global WarmingIncreased Temperature

Habitat Damage and

Species Affected

Changes in Water Supply

Rising Sea Level

What’s the proof that global warming is taking place?

Portage Glacier

1914 2004

• Alaska

Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org

Colorado River• Arizona

June 2002 Dec 2003

Why is global warming happening?

Burning of Fossil Fuels

Pollution from coal, natural gas, and oilPollution from coal, natural gas, and oilPollution from coal, natural gas, and oil

When did global warming start?

Global Atmospheric Concentration of CO2

What is carbon dioxide and how is it discovered?

Joseph Black, a Scottish chemist and physician, first identified carbon dioxide in the 1750s. At room temperatures (20-25 oC), carbon dioxide is an odourless, colourless gas, which is faintly acidic and non-flammable. Carbon dioxide is a molecule with the molecular formula CO2. The linear molecule consists of a carbon atom that is doubly bonded to two oxygen atoms, O=C=O.

Applications of carbon dioxide by humans

Humans use carbon dioxide in many different ways. The most familiar example is its use in soft drinks and beer, to make them fizzy. Carbon dioxide released by baking powder or yeast makes cake batter rise. Some fire extinguishers use carbon dioxide because it is denser than air. Carbon dioxide can blanket a fire, because of its heaviness.

The part carbon dioxide plays in environmental processes

Carbon dioxide plays an important part in vital plant and animal process, such as photosynthesis and respiration.

Environmental problems - the greenhouse effect

• Greenhouse gasses absorb some of the heat and trap it near the earth's surface, so that the earth is warmed up. This process, commonly known as the greenhouse effect.

• The amount of heat in the troposphere depends on concentrations of atmospheric greenhouse gasses and the amount of time these gasses remain in the atmosphere. The most important greenhouse gasses are carbon dioxide, CFC's (Chlor-Fluoro-Carbons), nitrogen oxides and methane.

Carbon dioxide and health The primary health dangers of carbon dioxide are:

- Asphyxiation. Caused by the release of carbon dioxide in a confined or unventilated area. This can lower the concentration of oxygen to a level that is immediately dangerous for human health.- Frostbite. Solid carbon dioxide is always below -78 oC at regular atmospheric pressure, regardless of the air temperature. Handling this material for more than a second or two without proper protection can cause serious blisters, and other unwanted effects. Carbon dioxide gas released from a steel cylinder, such as a fire extinguisher, causes similar effects.- Kidney damage or coma. This is caused by a disturbance in chemical equilibrium of the carbonate buffer. When carbon dioxide concentrations increase or decrease, causing the equilibrium to be disturbed, a life threatening situation may occur.

How is global warming measured?

Ice Core DataIce Core Data

COCO22 Measurements Before 1958 - Antarctica Measurements Before 1958 - Antarctica

CO2 Atmospheric Measurements

CO2 Measurements Since 1958 – Mauna Loa, Hawaii

Temperature (Northern Hemisphere) CO2 Concentrations

1000 Years of CO2 and Global Warming

Deg

ree

Cel

sius

Incr

ease

Part

s Pe

r Mill

ion

Year Year

10

00

1200

1400

1600

1800

2000

1000

1200

1400

1600

1800

2000

Global Warming:Global Warming: Shifting GearsShifting Gears

2007

Goal: Reductions in CO2 Per Year

Bill

ions

of M

etric

Ton

s C

arbo

n

2007Reductions

in CO2

Per Year

Gig

aton

Car

bon

Produce electricity efficientlyUse electricity efficientlyVehicle efficiencySolar and Wind PowerBiofuelsCarbon capture and storage

Bill

ions

of M

etric

Ton

s C

arbo

nOur Goal

What’s being done now to reduce our emissions?

Solar Power Wind Power Fuel-Efficiency

What can you do to help solve the What can you do to help solve the problem?problem?

Simple Things To Do

Turn off your computer or the TV when you’re not using it.

Take shorter showers. Heating water uses energy.

Keep rooms cool by closing the blinds, shades, or curtains.

Turn off the lights when you leave a room.

Use compact fluorescent bulbs.

Be Bulb Smart—Use CFLsIncandescent

Compact Fluorescent

500 lbs. of coal

What’s the difference?

•1,430 lbs. CO2 pollution avoided •$30 saved

Simple Things To Do Dress lightly when it’s hot instead of turning up

the air conditioning. Or use a fan.

Dress warmly when it’s cold instead of turning up the heat.

Offer to help your parents keep the air filters on your AC and furnace clean.

Walk short distances instead of asking for a ride in the car.

Plant a tree. Recycle.

Creditsa.online.nwf.org/site/.../cc_whats_up_with_global_warming.ppt?docIDb. http://www.undeerc.org/PCOR/videogallery/default.aspx

Phase 2- Activity

a. Designing and Constructing The Temperature Readerb. Using the temperature reader in an experiment.c. Fill out the worksheet as you perform the experiment.

Phase 3- Reflection, Feedback and RevisionUse the rubric to evaluate the temperature reader and laboratory sheet. Then switch with other groups and let them do the same. Revise the temperature reader and lab worksheet as needed.