You want to know whether plants grow faster if there is music playing in their environment. How would you conduct this experiment? Be sure to identify the independent and dependent variables, and the constants.
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An electromagnetic has a metal core (iron rod) with wire wrapped around it. Make an electromagnetic so that you understand how it works.
2. Once you understand the workings of an electromagnetic, then you have the background knowledge to design an investigation that has one independent variable and one dependent variable. For example:
What effect does the size of the iron core have on the strength of an electromagnetic?
Note: This is a cause effect question. The effect will be the strength of an electromagnetic. The cause is the size of the iron core.
The effect is always the dependent variable.
The cause is always the independent variable.
3. Note: All other variables that might affect the strength of an electromagnetic, such as the number of coils of wire wrapped around the rod, must remain the same. When testing each size iron rod, the type of wire and number of coils must be the same for each test. Since a battery is used, the same type and strength of the battery must be the same for each test.
2. Once you understand the workings of an electromagnetic, then you have the background knowledge to design an investigation that has one independent variable and one dependent variable. For example:
What effect does the size of the iron core have on the strength of an electromagnetic?
Note: This is a cause effect question. The effect will be the strength of an electromagnetic. The cause is the size of the iron core.
The effect is always the dependent variable.
The cause is always the independent variable.
3. Note: All other variables that might affect the strength of an electromagnetic, such as the number of coils of wire wrapped around the rod, must remain the same. When testing each size iron rod, the type of wire and number of coils must be the same for each test. Since a battery is used, the same type and strength of the battery must be the same for each test.
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