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10/5 Prac1_Experiment & Variables_ct - ETM

Last updated almost 3 years ago
10 questions

Goal - I can recognize the dependent variable, independent variable, and control variable(s) given an experiment.


STOP: If you didn't watch the video yet then click TBD.

Key Terms

-Variable: An element, feature, or factor that can vary or change (i.e. boat width, foot length, etc.)

-Dependent Variable: A variable whose ability to change depends on another variable and is measured.

-Independent Variable: A value not dependent on another value but directly changed by an experimenter.

-Control Variable: A variable that is kept the same throughout an experiment to avoid affecting the results.

*Scientific experiments can have many control variables but only one variable can be directly changed (independent)

and for simplicity we will allow only one measured variable (dependent). All other variables should be controlled.

1

Select all the things that can changed in this experiment below. Remember to select ALL that apply.

Experiment: Students drop a ball from different heights and record the falling time.

1

Identify the independent variable in the experiment below.

Experiment: Students drop a ball from different heights and record the falling time.

1

Identify the dependent variable in the experiment below.

Experiment: Students drop a ball from different heights and record the falling time.

1

Identify a control variable in the experiment below.

Experiment: Students drop a ball from different heights and record the falling time.

1

Select all the things that can be changed in this experiment below. Remember to select ALL that apply.

Experiment: A study was done to find if different tire treads affect the braking distance of a car.

1

Identify the independent variable in the experiment below.

Experiment: A study was done to find if different tire treads affect the braking distance of a car.

1

Identify the dependent variable in the experiment below.

Experiment: A study was done to find if different tire treads affect the braking distance of a car.

1

Identify a control variable in the experiment below.

Experiment: A study was done to find if different tire treads affect the braking distance of a car.

1

Select all the things that can changed in this experiment below. Remember to select ALL that apply.

Experiment: A toy car is turned on travelling a distance and then turned off some time later.

EXTRA PRACTICE (Not Required)

1

Key Term

-Scientific Hypothesis: A specific and testable prediction about the results of an experiment.

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Identify a scientific hypothesis that can be tested by the experiment below.

Experiment: Students drop a ball from different heights and record the falling time.