We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byAshton Tyler
Modified over 2 years ago
The Polar Ice Caps Created by Diane McDonough March 2012
What is happening to the polar ice caps?
Since 1979, the size of the summer polar ice cap has shrunk more than 20 percent.
Why are the ice caps shrinking?
MELTING The polar ice caps are undergoing a physical change.
MELTING is a change in state from a solid to a liquid.
MELTING occurs when the the water molecules gain enough thermal energy………..
Causing them to vibrate faster which raises their temperature.
Eventually the water molecules Break free from their position in the the ice crystals.
The overall sea water level rises. Walruses, seals, and polar bears are affected by the loss of the ice caps. As a result the ice caps shrink.
The melting of the ice caps is affecting my family.
The ice is freezing later in the fall and melting earlier in the spring This shortens our hunting season.
Where is all the food? The average bear’s weight has dropped 15%
Where will we go for food?
We have to swim to larger sea ice to hunt.
Which is further off the shore.
Many are unable to make the swim, Especially the cubs.
Our population is declining!
Why is this happening to our home?
GLOBAL WARMING The melting of the ice caps is caused by
Causes of GLOBAL WARMING
CAUSES OF GLOBAL WARMING Depletion of the ozone layer Production of greenhouse gases: carbon dioxide, methane, and nitrous oxide Include the following chemical reactions
CHEMICAL REACTIONS Occur when one substance breaks down into two or more substances Two or more substances combine, forming one or more new substances. OR
The Ozone Layer is a layer in the Earth’s atmosphere that protects the Earth from the sun’s harmful ultra-violet rays.
Occurs because of a Chemical Reactions involving Chlorofluorocarbons OZONE DEPLETION
The chemical reaction involved…….
Chemical reactions also produce greenhouse gases That trap heat in Earth’s atmosphere
Sources of greenhouse gas
1.Fossil fuel 2.Trees and Wood products 3.Solid waste Carbon dioxide is produced through combustion of
The chemical reaction for burning wood is
Methane is produced During the production and transport of coal, natural gas, and oil From livestock and other agricultural practices By the decay of organic waste in landfills
CO 2 + 4H 2 = CH 4 + 2H 2 O Landfill Chemical Reaction:
During agricultural and industrial activities Combustion of fossil fuel Nitrous oxide is produced
HOW CAN YOU CHANGE THE WORLD?
Stop using or reduce the use of ozone depleting chemicals Chlorofluorocarbons, halons, methyl bromide
Plant a tree Carbon dioxide is also removed from the atmosphere (or “sequestered”) when it is absorbed by plants as part of the biological carbon cycle.
Ride a bike, walk, or take public transportation
Drive a hybrid or more fuel efficient car
Use alternative energy sources
Use ENERGY STAR appliances and light bulbs
Turn off lights and appliances
Be part of the solution!
Presented in this content trailer is one of the theories on Global Warming. The other theory viewed by scientists is that Global Warming is a natural phenomena that has occurred in cycles throughout Earth’s history. Global Warming Theories
NASA Data Reveals 'Average' Ozone Hole in 2007
Music: John Mayer: Waiting for the World to Change David Bowie: Changes Michael Jackson: Man in the Mirror Created by: Diane McDonough Special thanks to Dan Williams
References http://www.nrdc.org/globalwarming/qthinice.asp http://ecocentric.blogs.time.com/2010/09/09/climate-change-a-slowdown-on- polar-melt/ http://www.carbonme.org/globalwarming.php http://www.moreinterestingfacts.com/global-warming-facts http://epa.gov/climatechange/emissions/index.html http://www.bom.gov.au/lam/Students_Teachers/ozanim/ozoanim.shtml http://www.theozonehole.com/images/ozoned2.jpg http://earthobservatory.nasa.gov/Features/ChemistrySunlight/chemistry_sunlight3. php http://www.nwf.org/global-warming/effects-on-wildlife-and-habitat/polar- bears.aspx
Greenhouse Effect - Natural Heating of Earth’s surface by certain atmospheric gases.
GLOBAL WARMING By Nicole.
Ozone & Greenhouse Effect. What is Ozone? Ozone is a molecule that occurs in the Stratosphere Ozone absorbs harmful UV rays from the sun O 3 + uv O 2.
Resources for Energy State Objective 4.d.. What are Resources? Natural resources are the parts of the environment that are useful or necessary for the.
AND SOLUTIONS! Environmental Issues. The environment is all connected! (p.87) Environmental issues fall into three general categories: 1. Human population.
Topic 6: Global Warming and Greenhouse Effect
Green house gasses Sultan althani 7E. Carbon dioxide Carbon dioxide is a colorless, neutral gas produced by burning carbon and organic mix and by respiration.
Global Warming causes the rise of the Earth’s water level. The temperatures will rise. It happens when greenhouse gases (carbon dioxide, water vapour,
1 Global Changes in the Atmosphere Global Warming and Ozone Depletion msnbcmedia.msn.com/j/msnbc/Components/Photos/...
Cloud formation and Atmospheric CO2. Cloud Formation There are a few ways clouds form 1.Rising Hot Air 2.Warm air over a cold body of water 3.On Mountainsides.
PPT Lecture: Global Warming. Slide 2 - Greenhouse Effect The process of the atmosphere trapping heat from the sun. Without the atmosphere, heat would.
The Sun’s energy passes through the car’s windshield. This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing.
Global warming: What is Causing it? The Warming of the Earth Could Change the Way You Picture the World!
Greenhouse Effect. The Greenhouse Greenhouses are used to grow plants, especially in the winter. The glass panels of the greenhouse let in light but keep.
Topic 6 Insolation and the Seasons. Insolation (INcoming SOLar radiATION) Intensity of Insolation depends on the angle of the Sun’s rays, which are due.
UNIT 4:. Lesson 1 – Greenhouse Effect Introduction to climate and climate change Greenhouse Effect.
Global Warming Dimi Voliotis. What is Global Warming? Global Warming is the rise in the overall temperature of the earth's atmosphere, generally attributed.
Module 1 – The Big Picture The Big Picture.
Sumaya S. Br.Nassry Mohammad 9th Grade Girls
9/24/13 Objective: How are humans impacting the environment? Do Now: What is this picture depicting?
© 2017 SlidePlayer.com Inc. All rights reserved.