1 / 31

Do Now:

Do Now:. Write down everything you know or have heard about Global Warming. Effects of Humans on the Environment: Climate Change. Hypothesis. Take a moment to write down some hypothesis for what will happen to: 1) The 2 beakers simulating greenhouse effect

trella
Télécharger la présentation

Do Now:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Do Now: • Write down everything you know or have heard about Global Warming.

  2. Effects of Humans on the Environment: Climate Change

  3. Hypothesis • Take a moment to write down some hypothesis for what will happen to: 1) The 2 beakers simulating greenhouse effect 2) The glass with ice simulating icebergs and sea ice 3) The glass with ice simulating glaciers and land ice

  4. Why is the Earth warm but Mars and the Moon are cold? The Greenhouse Effect

  5. The Greenhouse Effect has kept the Earth warm for billions of years.

  6. Draw a picture to help you understand how the Greenhouse Effect works

  7. The problem is, now the greenhouse effect is more intense and it is making the Earth too HOT!

  8. Too manycarbon emissions (putting CO2 into the air) have put more greenhouse gases into the atmosphere.

  9. THICKER greenhouse gases have trapped more heat. This has caused the Earth’s temperature to increase!

  10. Examples of carbon emissions: • Burning gas in cars • Burning coal/oil in factories c) Using a lot of electricity

  11. Causes of Global Warming Methane (CH4) Burning fossil fuels Deforestation

  12. Even worse, global warming starts new processes in motion that SPEED UP warming • Ice caps REFLECT sunlight back into space. • Open ocean ABSORBS sunlight as heat. • As ice caps melt, more light is absorbed than reflected. • As a result, global warming happens more rapidly.

  13. Need more evidence? • 11 out of the last 13 years have been the hottest on record. • Ice caps are shrinking: • All scientists agree that climate change is real and we must do something about it

  14. 2004 1914 Glaciers Shrinking • Alaska Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org

  15. Colorado River • Arizona Change over 1 year!

  16. Ice Cores • By drilling into the ice caps and analyzing the layers of ice, scientists can figure out what the climate was like thousands of years ago

  17. This is the data from the last 1000 years

  18. Pair and Share…Stop and Jot • Take a few minutes to summarize the evidence that global warming is occurring. Then, explain which piece of evidence is most alarming to you. Why?

  19. But wait…are Humans really to blame for global warming? Hasn’t the climate always been changing?

  20. GLOBAL WARMING is the increase of the Earth’s average surface temperature due to a build-up of greenhouse gases in the atmosphere. CLIMATE CHANGE is a broader term that refers to long-term changes in climate, including average temperature and precipitation. Difference

  21. Why should we care Rising Sea Level Increased Temperature Habitat Damage and Species Affected Changes in Water Supply

  22. Increased Temperature First, lets check out our experiment… • Thicker Greenhouse Gases cause increased temperature. • Increased global temperature causes more EXTREME weather. • Can be snowier in some areas, drier in others, more hurricanes

  23. Habitat Destruction and Species Affected

  24. Sea Level Rise First, let’s check out our experiment Sea Ice Land Ice WILL cause Sea Level Rise • Will not cause Sea Level Rise. • However, loss of sea ice will speed up global warming even more.

  25. Sea Level Rise • http://flood.firetree.net/

  26. Changes in Water Supply • Global warming DOES NOT decrease the amount of water on the globe • However, global warming DOES change weather patterns and causes droughts in some areas and floods in other places

  27. Even if all this doesn’t convince you, we should still do something. Let me show you why…

  28. Ok, what can we do!? • There is no one solution to global warming. In fact, global warming will take a long time to turn around and some effects are inevitable. • We need to make substantial changes to the way we use energy, how our electricity is produced, and how the products we buy are made. • We may even need to find ways of taking CO2 out of the atmosphere! • To see some small ways you can make a difference, we are going to do a GALLERY WALK!

  29. Exit Slip • 1) Describe how the greenhouse effect keeps the Earth warm? • 2) What are two pieces of evidence for global warming? • 3) Why should we care about climate change?

More Related