Scientific Method and Variables

What is the purpose of an experiment in the scientific method?

• To test the hypothesis through a controlled experiment.

• To gather data without any specific purpose.

• To prove the hypothesis is always correct.

• To observe natural phenomena without intervention.

Tags

NGSS.MS-PS1-2

What is a hypothesis?

• A definitive conclusion drawn from data.

• A testable explanation or prediction proposed to answer a scientific question.

• An untestable theory about the universe.

• A random guess made without evidence.

Tags

NGSS.MS-PS2-2

What are controlled variables?

• Factors that are kept constant throughout the experiment to ensure that the only variable changing is the independent variable.

• Variables that are changed during the experiment to test their effects.

• The main variable that is being tested in the experiment.

• Factors that are measured to determine the outcome of the experiment.

Tags

NGSS.MS-PS2-2

What do scientists do after making an observation?

• They formulate a question based on the observation.

• They conduct an experiment immediately.

• They write a report on their findings.

• They share their observation with the public.

What is a dependent variable?

• The variable that is measured or observed in response to changes in the independent variable.

• A variable that remains constant throughout the experiment.

• The variable that is manipulated by the researcher.

• A variable that has no effect on the outcome of the experiment.

Tags

NGSS.MS-PS1-2

What is an independent variable?

• The variable that the researcher manipulates or changes to observe its effect on another variable.

• The variable that remains constant throughout the experiment.

• The variable that is measured in response to changes in another variable.

• The variable that is not affected by any other variables in the study.

Tags

NGSS.MS-PS2-2

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

• The control group serves as a baseline that the experimental group is compared against to determine the effect of the independent variable.

• The control group is the group that receives the treatment being tested.

• The control group is used to manipulate the independent variable.

• The control group is the group that is not observed during the experiment.

What is the first step in the scientific method?

• Hypothesis: Formulating a testable statement.

• Experimentation: Conducting tests to validate the hypothesis.

• Observation: Scientists begin by observing a phenomenon or event.

• Conclusion: Analyzing data to draw a conclusion.

Give an example of an independent variable in an experiment.

• The amount of water given to plants

• The type of soil used for planting

• The color of light used in the experiment

• The temperature of the environment

Tags

NGSS.MS-LS1-5

What is peer review in the context of scientific research?

• A process where research is published without evaluation

• A method for researchers to collaborate on projects

• The process where other experts in the field evaluate the research for its validity, significance, and originality before it is published.

• A system for funding scientific research proposals.