Convection Activities
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LESSON PLANS created
BY:
Ken Kakasuleff
Frankton Elementary School
405 Sigler Street
Frankton, IN 46044
E-mail: kaky@iquest.net
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Subject Area: PHYSICAL
SCIENCE
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Grade Level: 4-6
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National Standards
- CONTENT STANDARD B: As a result of their activities in grades
5-8, all students should develop an understanding of
- Properties and changes of properties in matter
- A substance has characteristic properties, such as
density, a boiling point, and solubility, all of which are
independent of the amount of the sample. A mixture of
substances often can be separated into the original
substances using one or more of the characteristic
properties.
- Motions and forces
- Transfer of energy
- Energy is a property of many substances and is
associated with heat, light, electricity, mechanical motion,
sound, nuclei, and the nature of a chemical. Energy is
transferred in many ways.
- Objectives
- To demonstrate that heated air expands
- To demonstrate that warm air rises because it it less
dense
- Estimated Time
- Outcomes
- Students should demonstrate an understanding of the density of
air as related to temperature
- Students should be able to demonstrate the lifting force of
heated air
- Resources
- Internet connection
- Various materials as listed in each activity
- Assessment
- Students will be able to demonstrate knowledge of the basic
principles listed in the outcomes in a written exercise
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
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