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WorksheetsScientific Method Review
Total questions: 15
Worksheet time: 10mins
What is the purpose of the scientific method?
To solve problems and conduct experiments
To research new information
To practice safety
To become a scientist
Jennifer wants to know if students do better on their homework if they listen to classical music or hip hop music. What is the independent variable in this experiment?
Students' grades on homework
The age of the students
The volume of the music
The type of music
A dependent variable is __________.
What is measured as a result in an experiment
What you change in an experiment
A prediction about an experiment
What stays the same in an experiment
Why is it important to have constants (controlled variables) in an experiment?
So scientists know their results came only from the independent variable and nothing else
So scientists stay safe
So scientists can record data easier
So the experiment is clear and easy to understand
"Do new shoes make you run faster?" In this example, why can't the speed of the runner be a constant?
Because the speed of the runner is the independent variable so it cannot be a constant
Because the speed of the runner in the dependent variable so it cannot be a constant
Because the speed is not measurable so it cannot be a constant
The speed of the runner is a constand
These are variables that are kept the same throughout all experimental groups to prevent error in the experiment.
Independent Variable
Dependent Variable
Controlled Variable
Varying Variable
Christopher set up six tanks with equal volumes of 20 ℃ water. Three of the tanks contained water with a high salt content of 30 parts per thousand and three contained water with no salt. Christopher added an equal amount of green algae to each tank. He allowed the algae to grow in the tanks for two weeks. Then, he measured the amount of algae in each tank. Identify the question that Christopher’s experiment can best answer.
Is the growth of algae affected by the temperature?
Do algae grown in water with a high salt content release more oxygen than an equal amount of algae grown in water without salt?
Do algae grow more in water with high salt content than in water without salt?
When baking soda and vinegar are combined, they create bubbles of carbon dioxide gas. Kurt combined baking soda and vinegar in 12 different beakers. In each beaker, Kurt placed two tablespoons of baking soda and one tablespoon of vinegar. He used rice vinegar in four of the beakers, white vinegar in four of the beakers, and apple cider vinegar in four of the beakers. Kurt watched the beakers and recorded the amount of time that each mixture bubbled. Identify the question that Kurt’s experiment can best answer.
Does the type of vinegar mixed with baking soda affect the type of gas released by the mixture?
Does the type of vinegar added to baking soda affect how long the mixture bubbles?
Does the amount of vinegar added to baking soda affect how long the mixture of baking soda and vinegar bubbles?
A possible explanation to a problem that has not yet been tested.
data
theory
hypothesis
conclusion
In a controlled experiment, how many variables can be worked with at a time?
one
none
two or more
how ever many makes sense.
When conducting an experiment you MUST must make sure that you ______ in order to ensure it's a FAIR TEST.
only change 1 variable and keep all others constant
conduct 3 trials
measure the dependent variable
test multiple variables
