7.4: Climate change site guide

Transcription

1 7.4: Climate change site guide 1. Greenhouse gasses: Watch this video and fill in the notes on the table. 1. Google YouTube: How do greenhouse gasses actually work? Or type this in: Original link: For later Google YouTube: A.3.3 Explain what occurs at a molecular level during absorption of IR by molecules IB Chemistry SL Or type this in: Original link: YouTube: Why is CO2 a greenhouse gas. This video covers the numerical calculations behind the vibration frequency The Greenhouse effect Watch this video and fill in the notes on the table. Google YouTube: The greenhouse effect, NASAearthobservatory Or type this in: Original link: For later YouTube: Bozeman science; The Greenhouse effect 3. The Carbon cycle Watch the video on this page. Original link: 4. Climate change Read and flip through the pages here to complete the notes. Original link: Then, click on See the impacts to complete the last column in this section. Choose Effects on people and the environment For later: Feel free to explore the epa s website for more information on climate change and how you can get involved. There are opportunities to collect data in your own neighborhood as well as suggestions on how to be part of the solution. 5. Bill Nye with National Geographic Watch: Original link:

2 Unit 7: Gasses Standard 7.4: Climate Change Name Warm up: What is the green house effect? Is it good? Bad? Neither? Explain. Use to find definitions for the following: NOTE: Choose the definition you think best applies to this 7.4 standard. Vocabulary: Climate: Weather: Radiation: Infrared: (IR) Ultraviolet: (UV) _ Which radiation is higher energy? IR or UV? What are the products of combustion? Next, Follow the site guide to complete the note catcher

3 Compare and contrast the range of temperature on the moon and earth. Visible light enters the earth s atmosphere. It is absorbed by the earth s surface and then, the heat is released as radiation. List gases able to absorb infrared radiation. Depict the motion of a CO 2 molecule when absorbing radiation. 1. Greenhouse gases (~7 min) What is responsible for this difference? Why does the earth not freeze solid at night? Why do some gasses absorb IR and others do not? radiation (UV) is absorbed by the earth and is then emitted as Describe how the greenhouse effect maintains the surface temperature of earth. What is radiative equilibrium? Additional Notes: 2. The Greenhouse effect (~ 5 min) What percent of the long wave radiation (IR) emitted by the surface of the earth escapes directly into the atmosphere? How do CO 2 (g) and H 2O (g) cause the Earth s greenhouse effect?

4 Where is carbon found on earth? What forms does it take? Where do fossil fuels come from? What are some examples of fossil fuels? How does burning fossil fuels affect the carbon cycle? How does cutting down forests affect the carbon cycle? Explain the bathtub analogy: 3. The carbon cycle Describe the carbon cycle. (~7 min) How can we help bring the carbon cycle closer to its natural balance? How do scientists know the amount of carbon dioxide in the atmosphere throughout history? Ruled out! Explain why each of the following suggested reasons for climate change has been disproven. The Sun: Sketch the two graphs, Carbon dioxide in the atmosphere and Carbon dioxide emissions from people s activities Skip back to See the impacts. Choose two that interest you. Take notes of What s happening now?, What will happen in the future? and Why does it matter? 4. Climate change Sketch the graph of Carbon Dioxide in the Atmosphere [Remember TULIP] The Earth s orbit: (~10 min) Volcanoes: What connection can you make? During which time period in history did CO 2 levels in the atmosphere begin to rise significantly?

5 5. Bill Nye with National Geographic Bill Nye states that climate change is a and issue. Explain why Nye states that one of the biggest victims of climate change are our oceans: What can we do on a personal level to help thwart climate change? After the video: Nye states that an ice cube approximately 4mi on each side has melted into our oceans. What is the main cause of changes in climate that have occurred throughout history? Find the length of each side in meters given: 1 mi = 1609 m What is the volume in m 3? 97% of scientists agree that the recent abrupt change in climate is caused by What is ocean acidification? Approximately how much have our oceans raised? Find the mass of this amount of ice given: 1 m 3 = 1 x 10 6 ml Density of ice is g/ml Find the volume of water, in gallons, this 4mi 3 block of ice has added to our oceans, given: Density of water is g/ml 1L = 1000mL 1L = gal It is estimated that the total volume of all of our oceans is 3.33 x 10 8 mi 3. What percentage of water has been added by glacial melting? Hint: You ll need to use many of the conversion factors above and part/whole x 100 for percent. Closure: What is the green house effect? Is it good? Bad? Neither? Explain. What is climate change? Is it good? Bad? Neither? Explain.