Variables and Research Notes from Class

Variables: The things that can change in an experiment.

Independent: What YOU will be changing. (only 1 item)

Dependent: What you will be measuring.

Controlled: What you will be keeping the same. (This is what keeps the experiment “fair”.)

Examples:

Which propeller makes more energy?

Independent Variables: types of propellers

Dependent Variables: amount of energy

Controlled Variables: fan strength, distance of fan from propeller, duration of testing, testing location, same motor, same fan, same volt meter

Does music effect reaction times?

Independent Variable: types of music

Dependent Variables: reaction speeds

Controlled Variables: volume of music, distance of hand from buzzer, color of light, testing location, same songs for each test

Does riding position effect bicycle speed?

Independent Variable: riding positions

Dependent Variable: bicycle speed

  Controlled Variables: testing location, type of bike, rider, amount of air in tires

RESEARCH:

  • 1-2 paragraphs long (use strong sentences)
  • Look up real information about your topic.

Examples:

Which propeller makes more energy?

I could research information about these topics: Where the U.S. obtains its energy. Renewable verses Nonrenewable energy. How windmills work.

Does music effect reaction times?

I could research information about these topics: How many car accidents are there each year in the U.S. What kinds of things effect human focus. Car safety.

Does riding position effect bike speed?

I could research information about these topics: Aerodynamics. The physics behind movement. Wind resistance. Bike races in the U.S. Preferred bicycles of pro-cyclists.

Please help your child fill out the bibliography page when doing the research. This is a small step up from simply listing the sources, like we did for the research reports.

Warmly,

Mrs. Bennon

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