Convection Activities

 

LESSON PLANS created BY:

Ken Kakasuleff
Frankton Elementary School
405 Sigler Street
Frankton, IN 46044
E-mail: kaky@iquest.net

 

Subject Area: PHYSICAL SCIENCE

 

Grade Level: 4-6

 

National Standards

Objectives
Estimated Time
Outcomes
Resources
Assessment
 

Key Questions

1. What happens when air is heated or cooled?
2. How does the temperature of air affect air density?

Heating of the earth, which in turn heats the atmosphere, is responsible for the motions and movements of the air in the atmosphere. The faster molecules move, the hotter the air. As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward. This is the concept used in the hot air balloons. The air is heated by the burner and the expanding air becomes less dense, causing the balloon to rise through the denser, cooler surrounding air.


Teacher directed activities

Whirly-gig

Mysterious coin

Inflating balloon

Floating bag



Return to Aeronautics Activities
Return to Aerospace Activities Page
Return to Learning Technologies Home Page
Atmosphere Simulator
Atmosphere Model
Air Density


Please send any comments to:
Curator:
Tom.Benson@grc.nasa.gov
Responsible Official: Kathy.Zona@grc.nasa.gov