AIM: What is Global Warming? DN: Fill in the following chart: ProblemDefinitionCauseEffect Acid Rain Ozone Depletion.

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Presentation transcript:

AIM: What is Global Warming? DN: Fill in the following chart: ProblemDefinitionCauseEffect Acid Rain Ozone Depletion

Global Warming A gradual increase in the temperature of the surface of the Earth

The Greenhouse Effect The trapping of heat by gases in the atmosphere Raises the average temperature of the Earth Why is this needed for life to exist? It keeps the temperature warm enough for life to exist

Greenhouse Gases Trap heat 1. Carbon Dioxide burning fossil fuels such as coal, oil and natural gas 2. Methane- decomposing wastes in landfills 3.Nitrous Oxide- fertilizers 4.Water Vapor An increase in greenhouse gases in the atmosphere is caused by burning of fossil fuels.

WHAT ARE THE EFFECTS OF GLOBAL WARMING?????

1. Rising Sea Levels Caused by melting glaciers Flooding of coastal cites

2. Extinction Species may not be able to adapt to change in climate Decrease in biodiversity

3. Effect on plants and animals Possible migration to cooler areas Change in life cycles –Extend time for warmer climate plants

4. Human Health Increased geographical area for tropical diseases- ideal conditions for many insects such as mosquitoes –Malaria, West Nile Virus, Dengue Fever –cholera

5. Storms Warmer ocean water = more hurricanes Floods, loss of lives, damage to property

6. Droughts Crop failure Decrease in global food production- starvation

7. Economy Cost of natural disasters Increase in food and energy costs

8. Ecosystems Land, water, air Change in ecosystems can decrease the biodiversity- plants and animals may not be able to adapt Migration of animals- depletion of resources in certain ecosytems

1.What are some natural sources of pollution? 2.What are particulates? 3.What causes normal precipitation to become acidic? 4.Explain why Carbon Monoxide is a dangerous air pollutant. 5.What is the function of the ozone layer? 6.Why is there concern about CFC’s in the stratosphere? 7.What are some effects of UV radiation on living things? 8.Define the term greenhouse effect. 9.What are some greenhouse gases? 10.What is global warming and what is believed to be its cause?