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16.2 Air Quality KEY CONCEPT pg. 488 Fossil fuel emissions affect the biosphere. Please write out the 6 vocab words from this section.

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Presentation on theme: "16.2 Air Quality KEY CONCEPT pg. 488 Fossil fuel emissions affect the biosphere. Please write out the 6 vocab words from this section."— Presentation transcript:

1 16.2 Air Quality KEY CONCEPT pg. 488 Fossil fuel emissions affect the biosphere. Please write out the 6 vocab words from this section.

2 16.2 Air Quality MI State Standards Met in this section L3.p4A -- Recognize that, and describe how, human beings are part of Earth’s ecosystems. Note that human activities can deliberately or inadvertently alter the equilibrium in ecosystems. B3.4C-- Examine the negative impact of human activities. B3.4xHuman Impact Humans can have tremendous impact on the environment. Sometimes their impact is beneficial, and sometimes it is detrimental. B3.4d-- Describe the greenhouse effect and list possible causes. B3.4e-- List possible causes and consequences of global warming.

3 16.2 Air Quality Pollutants accumulate in the air. Pollution is any undesirable factor added to the air, water, or soil. Smog is one type of air pollution. –sunlight interacts with pollutants in the air –Pollutants, called particulates, produced by fossil fuel emissions –made of particulates and ground- level ozone Areas with more sunlight, like the southern states, will experience more smog.

4 16.2 Air Quality Ozone: Good and bad Ground level ozone contributes to smog, and is harmful to living things. Ozone in the stratosphere act as a shield protecting Earth’s biosphere against harmful ultraviolet (UV) rays found in sun light. [UV rays contribute to skin cancer]

5 16.2 Air Quality Smog can be harmful to human health. Acid rain is caused by fossil fuel emissions. –produced when pollutants in the water cycle cause rain pH to drop –can lower the pH of a lake or stream, to a pH of 4.6 –Normal rain pH is 5.6 –can harm trees

6 16.2 Air Quality This cartoon is not in the student notes.

7 16.2 Air Quality Air pollution is changing Earth’s biosphere. The levels of atmospheric carbon dioxide rise and fall over time. High levels of carbon dioxide are typical of Earth’s warmer periods.

8 16.2 Air Quality Air pollution is changing Earth’s biosphere. MI State Standards Alert!!! B3.4xHuman Impact Humans can have tremendous impact on the environment. Sometimes their impact is beneficial, and sometimes it is detrimental. B3.4d -- Describe the greenhouse effect and list possible causes. B3.4e -- List possible causes and consequences of global warming.

9 16.2 Air Quality The greenhouse effect slows the release of energy from Earth’s atmosphere, trapping the heat in. –sunlight penetrates Earth’s atmosphere –energy is absorbed and reradiated as heat –greenhouse gases absorb longer wavelengths –Greenhouse gas molecules rerelease infrared radiation methane ( CH 4 ) water (H 2 O ) carbon dioxide (CO 2 )

10 16.2 Air Quality Greenhouse gases help to hold heat in earth’s atmosphere. –Gases like methane (CH 4 ), carbon dioxide (CO 2 ) along with water vapor(H 2 O) Without greenhouse gases, the earth would lose its heat and become cold, never able to sustain life.

11 16.2 Air Quality Air pollution is changing Earth’s biosphere. Human activity that pours more CO 2, CH 4 into the atmosphere include activities such as… –Automobiles burning fossil fuels, like gasoline –Growth of industry B3.4dDescribe the greenhouse effect and list possible causes.

12 16.2 Air Quality Global warming refers to the trend of increasing global temperatures. North Pole

13 16.2 Air Quality Results of global warming… –Increased flooding –Stronger tropical storms –The loss of biodiversity (loss of stability in an ecosystem) –Polar ice caps and glaciers are melting B3.4eStudent need to be able to list possible causes and consequences of global warming.

14 16.2 Air Quality Please complete the Section Assessment for section 16.2, pg. 492, #’s 1-5.


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