DNMQ #2: The Scientific Method (Fall 2024)

What is a hypothesis?

• A proposed explanation or prediction that is based on research and can be tested through experimentation or observation.

• A statement that cannot be proven or disproven.

• A conclusion based on limited data or personal opinion.

• A random guess without any evidence or reasoning.

What is the purpose of a control group in an experiment?

• To introduce bias into the experiment.

• To confuse the results.

• To increase the sample size.

• To provide a baseline for comparison

What is the difference between qualitative and quantitative data?

• Qualitative data is numerical and objective, while quantitative data is descriptive and subjective.

• Qualitative data is quantitative and objective, while quantitative data is qualitative and subjective.

• Qualitative data is objective and numerical, while quantitative data is subjective and descriptive.

• Qualitative data is descriptive and subjective, while quantitative data is numerical and objective.

Why is it important to repeat experiments in the scientific method?

• To waste time and resources.

• To confuse researchers.

• To ensure reliability and validity of results

• To make the results less accurate.

What do we call the part of the experiment that remains the same for the control and experimental group?

• constants/ controlled variables

• control
• independent
• dependent

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the independent variable.

• distance traveled by the ball
• height of the ramp
• mass of the ball
• weight of the ball

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy.  Three different sodas were tested. They measured the height of the foam eruption.   What is the dependent variable?

• Brand of soda
• Number of mentos candies used
• Height of foam eruption
• Temperature of soda

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

The best question for this experiment would be....

• Do plants need sunlight to grow?

• How tall can a plant grow?

• How much water is needed for plants to grow the tallest?

• Why do plants need water to grow?

“If soil temperatures rise, then plant growth will increase.” This is an example of a _____.

• Scientific Law

• Hypothesis

• Independent Variable

• Dependent Variable