Description:
This PowerPoint lesson covers the topics of: Earth’s energy budget, Atmospheric Layers (troposphere, stratosphere, mesosphere, thermosphere, location of ozone layer), Montreal Protocol and remediation of ozone destruction by CFC’s, Greenhouse Effect (natural and anthropogenic), Greenhouse Gases (GHG). It begins with a teacher demonstration of heat transfer by radiation (review of grade 7 science). Videoclips are embedded into the powerpoint.
Standards Alignment:
» Add a Curriculum Benchmark Alignment!
21st Century Skills: (learn more)
No 21st Century Skill alignments have been added for this activity yet.
Tools & Materials:
• Clickers for each student.
Alternatives to clickers can include:
-mini-whiteboards for each student – which they can write their answer on and
hold up (could also be laminated paper)
-students hold up fingers to represent their answer.
• Radiation Demo: black mitt, white mitt, heat lamp, 2 thermometers
See attached document Heat Transfer through Radiation for instructions for the demo using oven mitts.
You can make the black and the white mitts from felt. Use a needle and thread to sew two sheets of white (black) felt together into a mitt shape. Cut away excess around the seam. Glue can also be used. The “home made” versions are preferred since the insulating capacity of real oven mitts will reduce the temperature difference felt by the students.
Note: when conducting the demonstration have the student wearing the mitts close their eyes before and during the experiment. Have another student place the two different mitts on their hands “at random”. This provides an excellent example of a scientific and literal “blinded experimental design”
• Albedo effect investigation: see attached Can White Roofs Mitigate Climate Change? — Investigation
Time Required:
75 to 90 minutes
Process:
Direct Instruction with demonstrations and virtual simulations
incorporating
Evaluation Rubric:
Assessment for Learning using Clickers (if no clickers, students can hold up
hands with the number of fingers showing representing the answer, e.g. 1 finger = a)
Assessment for Learning : Clicker multiple choice questions.
Teacher Notes:
1. This Powerpoint Lesson can stand alone. Teacher notes are provided for each slide and can be printed out by the teacher ahead of time.
2. The lesson includes two Demos that will need to be set up ahead of time: Demonstration of Heat Transfer and the Albedo Effect.
3. The topic outline is: Layers of the Earth’s Atmosphere, Heat Transfer by Radiation, Greenhouse Gases, Natural Greenhouse Effect, Anthropogenic contributions to Greenhouse Effect, Albedo Effect.
4. Hot links are embedded into the presentation. You will need access to the internet. Please check the links before you show this to the students; they are only active when in presentation mode. You may need to download some plug-ins to play all of these.
5. Earth’s Atmosphere: great resource is http://www.eo.ucar.edu/basics/wx_1_b.html
Attached is a diagram of the Earth’s Atmosphere that the students can label and sketch temperature patterns on.
6. The demonstration of Heat Transfer through Radiation is linked to slide #10 in the Powerpoint. It is a review of Heat Transfer (grade 7).
Two methods are provided, one using black and white oven mitts and the other using black and white felt mitts. You will need to make the latter but it is easy. The “home made” versions are preferred since the insulating capacity of real oven mitts will reduce the temperature difference felt by the students.
For this, have a heat lamp (if no heat lamp, use an incandescent light) plugged in for at least 10 min prior to the beginning of the class (if possible). SAFETY: Supervise this demo closely to ensure that students do not touch the actual “hot” bulb.
For the oven-mitt method, the instructions are attached.
For the felt-mitts: You can make the black and the white mitts from felt. Use a needle and thread to sew two sheets of white (black) felt together into a mitt shape. Cut away excess around the seam. Glue can also be used.
Note: when conducting the demonstration have the student wearing the mitts close their eyes before and during the experiment. Have another student place the two different mitts on their hands “at random”. This provides an excellent example of a scientific and literal “blinded experimental design”
7. You may wish to download some of the simulations on to your own computer. Clear instructions are given on the webpages that you are taken to.
Attachments:
• Powerpoint lesson: Earth’s Energy Budget
• Layers of the Earth’s Atmosphere Worksheet
• Earth’s Energy Budget Worksheet
• Heat Transfer through Radiation
• Albedo Effect (Can White Roofs Mitigate Climate Change? – Investigation)
|
Home
TIGed
