NOS 1.1 and 1.3 - experimental design

What is the primary purpose of a control group in a scientific experiment?

• To test multiple variables at once

• To provide a baseline for comparison

• To speed up the experiment

• To make the experiment more complex

Which of the following best describes an independent variable?

• The variable that changes as a result of the experiment

• The variable that remains constant

• The variable that the scientist manipulates

• The variable that has no effect on the experiment

In a scientific experiment, what is the role of a hypothesis?

• To state the final conclusion

• To list the materials needed

• To provide a testable prediction

• To describe the experimental procedure

What is the most important reason for recording detailed observations during an experiment?

• To make the lab report longer

• To impress the teacher

• To allow others to replicate the experiment

• To use more scientific vocabulary

Which step should come immediately after collecting data in a scientific investigation?

• Form a new hypothesis

• Analyze and interpret the data

• Start a new experiment

• Share results with others

What is the purpose of peer review in scientific research?

• To make the research more complicated

• To validate and improve the quality of research

• To compete with other scientists

• To increase research funding

When conducting an experiment, why is it important to have multiple trials?

• To make the experiment take longer

• To use more materials

• To reduce experimental error

• To confuse the results

What should a scientist do if experimental results don't support their hypothesis?

• Ignore the results

• Change the data to fit the hypothesis

• Accept the results and revise the hypothesis

• Stop doing experiments

Which of the following is NOT a characteristic of a well-designed experiment?

• Clear procedures

• Controlled variables

• Single trial only

• Measurable results

What is the main purpose of creating graphs and charts from experimental data?

• To visualize patterns and relationships

• To make the report colorful

• To use computer software

• To spend more time on the project