Guide to Propulsion
Grade Level: 9
Time Required: 2 class periods
Concepts and Processes:
models, and explanation.
- Form and
as Inquiry: Understandings about scientific inquiry.
and properties of matter.
Tools - Use content-specific tools, software and simulations
(e.g., environmental probes, graphing calculators, exploratory environments,
Web tools) to support learning and research.
and Decision-Making Tools - Routinely and efficiently use on-line
information resources to meet needs for collaboration, research,
publications, communications, and productivity.
- You will study
the effects of a change in temperature on gas molecules using a balloon
and an Erlenmeyer Flask.
- After observing
changes in the balloon during the procedure, you or you and your group
will, with the aid of the Beginner's
Guide to Propulsion, offer an explanation of the changes and apply
what you have learned to a gas turbine engine.
- You will investigate
a question you or you and your group have about pressure and/or gas
Guide to Propulsion is a Web site of information prepared by
the NASA Glenn Research Center to help you better understand aircraft
engine propulsion. Click on the Beginner's
Guide Index to access the list of slides. Open the slides entitled
Engine Temperature Ratio (ETR),
and Gas Turbine Propulsion.
Read the descriptions. Use these descriptions as background information
to help you complete the activity.
pushing of the balloon inside the flask by atmospheric pressure is presented
as an aid in visualizing the effects of air temperature, pressure, and
B. This lesson
is a cooling effect and a jet engine is a warming effect.
C. This lesson
works well when students are shown the end result initially and asked
how the balloon was put inside the flask.
be assessed on the extent of detail provided by your observations and
by the use of scientific concepts in your explanations as recorded in
be evaluated on your ability to research an extension question and present
to the class information found in the Beginner's
Guide to Propulsion on the World Wide Web. You are expected
to be on task, and journals will be randomly checked.
Norma Holowach, Lakeview High School, Cortland, Ohio