global warming - Ms Dudek`s Website
Transcript global warming - Ms Dudek`s Website
by Rowena Renon-Adalla
Living Environment Teacher
Bronx High School for the Visual Arts
Phase 1- Learning The Concepts -2 class periods
• Understanding Global Warming
Phase 2- Activity- 2 class periods
• Modeling, Designing and Using Temperature
Phase 3- Reflection, Feedback and Revisions- 1 day
Phase 1- Learning The
• Understanding Global
a. How does global warming work?
b. What’s up with global warming?
c. How does carbon dioxide emission affect global warming?
Write at least three questions
about the diagram/picture.
What is global warming?
How Global Warming Works
Carbon Dioxide (CO2)
Fossil fuels (coal, oil, natural gas)
Example of the
The Sun’s energy
passes through the
This energy (heat)
is trapped inside
the car and cannot
pass back through
causing the inside
of the car to warm
What’s the difference
between “global warming”
and “climate change”?
is the increase of the
due to a build-up of
greenhouse gases in
is a broader term that
refers to long-term
changes in climate,
Effects of Global Warming
Rising Sea Level
Habitat Damage and
Changes in Water Supply
What’s the proof that
global warming is taking
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
Why is global warming
Burning of Fossil Fuels
Pollution from coal,
natural gas, and oil
When did global warming start?
Global Atmospheric Concentration of CO2
What is carbon dioxide and how is it
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
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
Carbon dioxide plays an important part in vital
plant and animal process, such as photosynthesis and
Environmental problems - the
• 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
- 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 Data
CO2 Measurements Before 1958 - Antarctica
CO2 Measurements Since 1958 – Mauna Loa, Hawaii
1000 Years of CO2 and
Parts Per Million
Degree Celsius Increase
Billions of Metric Tons Carbon
CO2 Per Year
Carbon Tons Carbon
Solar and Wind
What’s being done now to
reduce our emissions?
What can you do to help solve the
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
Turn off the lights when you leave a room.
Use compact fluorescent bulbs.
Be Bulb Smart—Use CFLs
500 lbs. of
•1,430 lbs. CO2 pollution avoided
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.
Phase 2- Activity
a. Designing and Constructing The Temperature Reader
b. Using the temperature reader in an experiment.
c. Fill out the worksheet as you perform the experiment.
Phase 3- Reflection, Feedback and Revision
Use 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.