CHAPTER 7: ENVIRONMENTAL IMPACTS

Lesson 4: Impacts on the atmosphere

?? Essential Questions What are some types of air pollution? How are global warming and the carbon cycle related? How does air pollution affect human health? What actions help prevent air pollution?

Vocabulary Photochemical smog Acid precipitation Particulate matter Global warming Greenhouse effect Air Quality Index

Importance of Clean Air Your body, and the bodies of other animals, uses oxygen in air to produce some of the energy it needs. Many organisms can survive for only a few minutes without air. But the air you breathe must be clean or it can harm your body

Types or Air Pollution Smog Photochemical smog is caused when nitrogen and carbon compounds in the air react in sunlight Acid precipitation is rain or snow that has a lower pH than that of normal rainwater

Types or Air Pollution Particulate Matter CFCs Carbon Monoxide The mix of both solid and liquid particles in the air is called particulate matter CFCs Carbon Monoxide

Global Warming and the Carbon Cycle Global Warming is an increase in Earth’s average surface temperature Effects of Global Warming The Greenhouse Effect The greenhouse effect is the natural process that occur when certain gases in the atmosphere absorbs and reradiate thermal energy from the Sun

The Carbon Cycle

The Greenhouse Effect

Health Disorders Measuring Air Quality The Air Quality Index (AQI) is a scale that ranks level of ozone and other air pollutants

Positive Actions National Initiatives Cleaner Energy How can you help? In USA, the Clean Air Act sets limits Cleaner Energy Using renewable energy resources How can you help? Reducing energy: Turn the thermostat down, walk to the store or use public transportation, etc.

Homework Workbook: Page 228 – 229 Textbook: Page 244 #1, 2, 3, 4, 5, 7 & 9 Write down questions and answers. Turn them into me