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In this video, we will discuss how to create your research question.

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We will look at what a research question exactly is, how to use the initial ideas that

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you brainstorm based on a previous video, and how to choose your variables.

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Your research question is marked under the exploration criterion.

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The research question simply asks, how does the independent variable affect the dependent

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variable?

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The independent variable is what you change, and the dependent variable is what you measure

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in your experiment.

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Let's see how to use your initial ideas for interests and hobbies to choose your variables

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and to create your research question.

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Your variables should be easy to work with.

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In other words, you should be able to use basic lab equipment or even equipment at home

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to carry out your experiment.

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To help you find such variables, you can use this variable list.

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Of course, you can use any other variable, just make sure that it's easy to measure.

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Let's see how to create research questions using your interests and hobbies and the variables

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list.

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1.

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Choose a specific area of interest, for example basketball.

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2.

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Choose two variables that are related to basketball, for instance the pressure in the ball and

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bounce height, and 3.

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Put them together into a research question.

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How does the pressure of a basketball affect its bounce height?

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Another example could be trains, mess and distance.

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How does the mess of a train affect the distance travelled when the train rolls down a slope?

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Finally, street music, height and frequency.

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How does the height of the water in a glass affect the frequency of sound?

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This is the research question that I will use in the example IA in this video series.

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It came from watching a street musician play a glass xylophone.

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These are all solid research questions, they should just be slightly refined later on.

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Let's see a few quick examples for the physics topics ideas that you brainstormed.

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Sound distance and intensity?

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How does the distance from a sound source affect intensity?

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Let's say you carried out a simple experiment in class to see how gravitational potential

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energy is converted into kinetic energy.

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You release the ball from different heights on a slope and you measure the distance travelled

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by the ball.

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You can slightly modify this experiment and work with the angle of the slope and the maximum

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speed reached by the ball.

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You can even change the ball to something else, for example a toy car.

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The research question would be how does the angle of a slope affect the speed of the toy

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car?

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Finally, let's work with capacitors, temperature and capacitance.

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How does the temperature around the capacitor affect its capacitance?

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Again, these are solid research questions and we will see how to make them even better

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in a later video.

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This completes step one, action two, now you know how to create your research question.

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In the next video, we will discuss how to think about and test your experiment.