Presentation on theme: "KEY CONCEPT pg. 488 Fossil fuel emissions affect the biosphere."— Presentation transcript:
1 KEY CONCEPT pg. 488 Fossil fuel emissions affect the biosphere. Please write out the 6 vocab words from this section.
2 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.B3.4x Human ImpactHumans 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 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 airPollutants, called particulates, produced by fossil fuel emissionsmade of particulates and ground-level ozoneAreas with more sunlight, like the southern states, will experience more smog.
4 Ozone: Good and badGround 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 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 dropcan lower the pH of a lake or stream, to a pH of 4.6Normal rain pH is 5.6can harm trees
7 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 Air pollution is changing Earth’s biosphere. MI State Standards Alert!!!B3.4x Human ImpactHumans 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 sunlight penetrates Earth’s atmosphere The greenhouse effect slows the release of energy from Earth’s atmosphere, trapping the heat in.sunlight penetrates Earth’s atmosphereenergy is absorbed and reradiated as heatgreenhouse gases absorb longer wavelengthsGreenhouse gas molecules rerelease infrared radiationmethane (CH4)water (H2O)carbon dioxide (CO2)
10 Greenhouse gases help to hold heat in earth’s atmosphere. Gases like methane (CH4), carbon dioxide (CO2) along with water vapor(H2O)Without greenhouse gases, the earth would lose its heat and become cold, never able to sustain life.
11 Air pollution is changing Earth’s biosphere. Human activity that pours more CO2, CH4 into the atmosphere include activities such as…Automobiles burning fossil fuels, like gasolineGrowth of industryB3.4d Describe the greenhouse effect and list possible causes.
12 Global warming refers to the trend of increasing global temperatures. North Pole
13 Results of global warming… Increased floodingStronger tropical stormsThe loss of biodiversity (loss of stability in an ecosystem)Polar ice caps and glaciers are meltingB3.4e Student need to be able to list possible causes and consequences of global warming.
14 Please complete the Section Assessment for section 16. 2, pg Please complete the Section Assessment for section 16.2, pg. 492, #’s 1-5.