Climate Change

Climate ChangeScience 9.4

StandardScience 6.4 e Students know differences in pressure, heat, air movement and humidity results in a change in weather.

Language of the DisciplineIce ageGlobal warmingGreenhouse gasOzone holeChlorofluorocarbon Anticipatory SetClimate ChangeIce ages- huge sheets of ice covered large parts of Earths surfaces. Ice sheets covered most of northern Erupoe and North America. It was 3 kilometers thick.The sheets melted and the rising oceans flooded coastal areas.

Global WarmingGradual increase in the temperature of Earths atmosphere Climate is changing because of Human activities. Greenhouse HypothesisThe Earths gasses holds in heat from the sun. Thats why it if comfortable to be outside. Definition: gases in the atmosphere that trap energy are called greenhouse gases. Sunlight heats the soil, benches and pots. This in turns heats the greenhouse.

Greenhouse HypothesisGases: Carbon DioxideWater VaporMethane Increased carbon dioxide may cause global warming by trapping more heat in the atmosphere. Changing levels of Carbon Dioxide Over the past 200 years, the level of carbon dioxide in the atmosphere has increased steadily. How do scientists know this?They measured the amount of carbon dioxide in air bubbles trapped in Antarctic ice. Gas bubbles in the ice provides sample of air from the time it was formed. Climate Variation HypothesisSatellite measures have shown that the amount of energy the sun produces increases and decreases slightly from year to year. Global warming's positive effects: Farmers can plant 2 crops instead of one Any plant can be farmed because its cooler

Global warmings negative effects:Higher temperatures cause evaporation from farmland. Dry soil blows away easily Warms up ocean water as well, which in turns creates hurricanes. It would also raise the sea level. Ozone DepletionOzone hole: a large area of reduced ozoneChemicals produced by humans have been damaging the ozone layer. Earths ozone layer filters harmful ultraviolet radiation from the sun.

ChlorofluorocarbonsDefinition: a major cause of ozone depletion is this group of compounds. (CFCs) Use in air conditioners RefrigeratorsCleaning electronic partsAerosol spaysDeodorants Scientists predict that banning the use of chlorofluorocarbons will gradually restore the ozone layer.

Results of Ozone Depletion A decrease in ozone depletion means an increate in the amount of ultraviolet radiation. The US and other countries have banned CFCs. Ozone depletion affects the whole world.Production of this chemical has decreased over the years. Size of ozone hole is expected to shrink over time. Modeling What are 3 possible effects of global warming?Do not just give me the answer.You need to find the page number. You need to give me the Quote straight out of the text that supports or answers this question. In other words: Not written in your own wordsChecking for UnderstandingWhat is global warming?What effect have human activities had on the ozone layer?What are CFCs?

Guided Practice Independent PracticeGuided Practice Worksheet numbers 1-3.

Stop! Have your work checked.

Independent Practice- Workbook pages Bill NyeVarious ArtistsTV Theme SongsiTunes 10.6.3Card SharksVarious ArtistsTV Theme SongsiTunes 10.6.3