Scientific Investigations

How many parameters or variables can be changed during a controlled experiment?

• Zero
• One
• Two
• As many as needed

A controlled experiment is performed.
Which variable is changed or manipulated by the investigator during the experiment?  (the cause)

• Independent variable
• Dependent variable
• Experimental variable
• Controlled variable

A controlled experiment is performed.
Which variable is the response, the measured value, or the output of the experiment?  (the effect)

• Independent variable
• Dependent variable
• Experimental variable
• Controlled variable

A controlled experiment is performed.
Which test subjects are used as the reference to which other test subjects are compared?

• Experimental group
• Control group
• Independent group
• Dependent group

A controlled experiment is performed.
Which test subjects have different levels or amounts of the independent variable?   This group is compared to the reference for any differences.

• Experimental group
• Control group
• Independent group
• Dependent group

A controlled experiment is performed.
Which variables must remain the same across all test subjects?

• Constants
• Similars
• Determinates
• Stables

What is a logical prediction about what will happen and why during the experiment? This comes before the experiment.

• Hypothesis

• Theory

• Investigation

• Dependent variable

What is a long-standing explanation of why a natural phenomenon happens? It is supported by evidence from many different experiments.

• Hypothesis

• Theory

• Investigation

• Dependent variable

What is a natural law?

• A statement that describes how matter and energy always behave in our universe.

• A statement that describes how the universe was formed and evolved with time.

• A statement that details how living organisms interact with non-living parts of the environment.

• A statement that describes how mass and motion change the universe.

Which is the most logical sequence of the scientific method?

• Observe → Ask questions → Hypothesis → Experiment → Retest → Theory

• Ask questions → Theory → Experiment → Observe → Retest → Hypothesis

• Observe → Ask questions → Experiment → Theory → Retest → Hypothesis

• Experiment → Observe → Ask questions → Hypothesis → Theory → Retest