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Science ISU

SCH3U - Unit 1 Presentation
by

Arabelle Soriano

on 13 May 2013

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Transcript of Science ISU

GREENHOUSE GASES
& HUMAN ACTIVITIES Atmosphere Atmosphere Atmosphere Atmosphere 31% is reflected 20% is absorbed in the atmosphere 49% is absorbed by Earth Thank you for listening!

Questions? Key Terms The natural warming caused when gases in Earth’s atmosphere absorb thermal energy that is radiated by the Sun and Earth. A process that removes greenhouse gases from the atmosphere; examples include the Canadian forest. A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms. GREENHOUSE GASES
& GREENHOUSE EFFECTS GLOBAL
WARMING Key Terms SOURCES OF
GREENHOUSE GASES The current cycle of global warming is changing the climate patterns that all living organism have come to depend on. What will we do to prevent global warming? How will we manage the changes we've created? While we struggle to figure it all out, the face of the Earth as we know it coasts, forests, oceans, farms, and snow capped mountains is at risk of major transformation Introduction to Global Warming Effects of Global Warming The planet is warming, from the North Pole to the South Pole, and everywhere in between. Globally, the mercury is already up more than 1 degree Fahrenheit and even more in sensitive Polar regions. The outcomes of rising temperatures are starting to take an effect, they're happening right now! The signs of global warming and its negative effects are appearing all over. The heat is not only melting glaciers and sea ice other parts of the world are also being affected.
Sea levels are expected to rise between seven and twenty-three inches by the end of the century, and continued melting at the poles could add between 4 and 8 inches.
Hurricanes and other storms are likely to become stronger .
Species that depend on one another may become out of sync. Which can lead to ecosystems changing and species will become extinct.
Less fresh water will be available. If the Quelccaya ice cap in Peru continues to melt at this current rate, it will be gone by 2100, leaving thousands of people who rely on it for drinking water and electricity without a source of either. The total Emissions in 2011 was equal to 6,702 Million Metric Tons of CO2 Electricity In the process of generating, transmitting and distributing electricity, carbon dioxide (CO2) and nitrous oxide (N2O) are emitted.
Electricity is the biggest source of greenhouse gases. Transportation Petroleum based products like gasoline emits carbon dioxide.
Over 28% of greenhouse emissions comes from transportation. Industry The emissions of greenhouse gases produced by industry production is made up of 2 categories:
1) Direct emissions - a result of burning fossil fuel for heat or power by chemical reations.
2) Indirect emissions - a result of burning fossil fuel at a power plant to produce electricity. Commercial and Residential Greenhouse gases are produced in fossil fuel combustion for heating and cooking needs, refrigerators, etc.
Produces carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) Agriculture Management for agricultural soils can lead to productions of nitrous oxide (N2O) and other gases. Carbon Dioxide It is released to the atmosphere when solid waste; fossil fuels (oils, natural gas and coal), and wood products are burned.
Carbon dioxide makes up 84% of the natural sources of greenhouse gases. Effects HUMAN SOURCES NATURAL SOURCES Methane Emission result from the rise production, the decomposition of organic wastes landfills, and the raising of livestock.
Methane is also emitted during the production and transport of coal, natural gas, and oil. Nitrous Oxide Emitted during agricultural and industrials activities, as well as during combustion of solid waste and fossil fuels. O N N Non natural effects (Fluorinated Gases) Emitted products of foam production, refrigeration, and or air conditioning called chloro fluorocarbons (CCFCs), as well as hydro fluorocarbons (HFCs) and per fluorocarbons (PFCs) generated by industrial processes. When substances are discharged into the air, such as from automobile or other engine combustions. GREENHOUSE GAS A gas in Earth’s atmosphere that absorbs and prevents the escape of radiation as thermal energy; examples include carbon dioxide and methane. GREENHOUSE EFFECT FOSSIL FUELS EMISSIONS SINKS GLOBAL WARMING An increase in global average temperature, which results to impacts on the Earth. ATMOSPHERE The mixture of gases surrounding the Earth. CLIMATE The average weather for a particular region and time period. The complex of a community of organisms and the community's environment functioning as an ecological unit. ECOSYSTEM The place or environment where a plant or animal naturally or normally lives and grows. HABITAT A very large body of ice moving slowly down a slope or valley or spreading outward on a land surface. GLACIER By: Sally, Sarah, Chloe, Chantelle, Arabelle BUT WAIT WERE NOT DONE YET!
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