Presentation on theme: "GLOBAL WARMING by Rowena Renon-Adalla Living Environment Teacher"— Presentation transcript:
1 GLOBAL WARMING by Rowena Renon-Adalla Living Environment Teacher Bronx High School for the Visual Arts
2 Lesson Phases Phase 1- Learning The Concepts -2 class periods Understanding Global WarmingPhase 2- Activity- 2 class periodsModeling, Designing and Using Temperature ReaderPhase 3- Reflection, Feedback and Revisions- 1 day
3 Phase 1- Learning The Concepts Understanding Global Warming
4 Possible Aim/s: Do Now: 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 questionsabout the diagram/picture.
7 How Global Warming Works Carbon Dioxide (CO2)Fossil fuels (coal, oil, natural gas)
8 Example of the Greenhouse Effect 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.
9 What’s the difference between “global warming” and “climate change”?
10 Difference GLOBAL WARMING is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere.CLIMATE CHANGEis a broader term that refers to long-term changes in climate, including average temperature and precipitation.
11 Effects of Global Warming Rising Sea LevelIncreased TemperatureHabitat Damage andSpecies AffectedChanges in Water Supply
12 What’s the proof that global warming is taking place?
13 Portage Glacier Alaska 1914 2004 Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
19 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.
20 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.
21 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.
22 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.
23 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.
29 Billions of Metric Tons Carbon Goal: Reductions inCO2 Per Year2007
30 Billions of Metric Tons Carbon Our GoalBillions of Metric Tons CarbonProduce electricity efficientlyUse electricity efficientlyVehicle efficiencySolar and Wind PowerBiofuelsCarbon capture and storageGigaton CarbonReductions in CO2Per Year2007
31 What’s being done now to reduce our emissions? Wind PowerSolar PowerFuel-Efficiency
32 We can stop global warming! Scientists agree that the burning of fossil fuels is causing global warming. Since these fuels are burned for energy, and everyone uses energy, everyone can help stop global warming just by using less energy or energy from renewable sources!
34 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, orcurtains.Turn off the lights when you leave a room.Use compact fluorescent bulbs.
35 Be Bulb Smart—Use CFLs What’s the difference? Compact Fluorescent Incandescent500 lbs. of coal1,430 lbs. CO2 pollution avoided$30 saved
36 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 turningup the heat.Offer to help your parents keep the air filters onyour AC and furnace clean.Walk short distances instead of asking for aride in the car.Plant a tree.Recycle.
38 Phase 3- Reflection, Feedback and Revision Phase 2- Activitya. 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.