1. Scattering and Absorption
How does the color of the aerosol affect the light energy hitting it?
Photo: L. Harkness

2. Notes
Scattering: light energy hits and bounces off a substance in different directions, causes cooling
Absorption: light energy taken in by substance, causes warming

3. Notes
Albedo: the ability of a substance to reflect back light energy (snow – high albedo; blacktop – low albedo)

4. Notes
Light Energy: energy coming from the sun; also known as electromagnetic energy

5. Video Notes
Describe what you see in the bottle with only compressed air.
How are the results different after aerosol particles (smoke from the matches) were added?

6. Video: Bill Nye Cloud in a Bottle Experiment
Click here for the video!!

7. Experiment
It’s a hot summer day. Which color shirt do you decide to wear, white or black? Why??

8. Experiment
Each group with be testing both pure snow and snow with soot.
Make sure you take detailed observations, including color, temperature, changes you see
Record your data on your lab handout
Be prepared to explain changes you see taking place

9. Alternate Experiment
Each group with design an experiment using the materials provided.
Once you have written you lab procedures, get them approved before moving on.
When you start your experiment, make sure you take detailed observations, including color, temperature, changes you see
Record your data on your lab handout
You will be completing a full lab report upon completion

10. Lab Report
At the conclusion of the experiment, you will write a full lab report with the following sections:
Introduction (include the problem or question and your hypothesis)
Materials (what did you use)
Procedure (how did you conduct your experiment)
Observations (what did you see taking place)
Data Tables and Graphs
Analysis/Discussion (interpret evidence)
Accept or Reject Hypothesis