Scientific Method J. Smith

A good experiment has several characteristics. Which characteristic is part of a scientifically sound experiment?

• Results are based on an untested process or procedure

• Results are based on a single experiment

• Results are not reviewed by peers

• Results can be reproduced

Tags

NGSS.MS-PS2-5

Which description defines a hypothesis?

• An account of an observed event

• a statement that explains a future event

• a testable idea that explains an observed event

• a statement that has been extensively tested or proven to be true

Tags

NGSS.HS-LS1-3

NGSS.HS-LS2-3

NGSS.HS-PS1-2

Which sequence of events describes the standard scientific method of investigation?

• hypothesis --> experiment --> analysis of data --> conclusion

• conclusion.--.experiment-->hypothesis-->analysis of data

• experiment --> hypothesis --> analysis of data --> conclusion

• hypothesis --> experiment --> conclusion --> analysis of data

Lee wants to make sure she understands the components of a good scientific investigation. She knows that it should be controlled and have a large sample size. Also, she thinks that the results should be communicated to other scientists. Which is another component that is necessary for a good investigation?

• It must be able to be replicated by other scientists.

• It must be conducted in a big lab.

• It must be done with expensive equipment.

• It must be run by a university scientist.

Ken must conduct a scientific investigation for a science project. He knows that scientific investigations involve many steps. Which step should Ken complete first?

• Plan the investigation.

• Collect and organize data.

• Define the problem to investigate.

• Defend conclusions drawn from data.

A group of students work together on several different activities during the week. Which of these activities could be part of a scientific investigation?

• Standing in line in the cafeteria

• recording the outdoor temperature

• reading parts of a play aloud

• learning the rules of a new game

The factors in an experiment that can be changed are called:

• Data

• Variables

• Solutions

• Events

Tags

NGSS.MS-PS2-2

In an experiment, there are two types of variables- independent and dependent. The independent variables are the ones that:

• Are not observable

• Are not manipulated by the scientist

• Are observed during the experiment

• Are manipulated by the scientist

Tags

NGSS.MS-PS2-2

Why do you need a control group in a controlled experiment?

• So that you know which variables were responsible for the results of the experiment

• So that the scientist has control over their experiment

• So that there are multiple groups

• So that the scientist has something to compare their experimental results with

An experiment is based on a comparison between what two types of groups?

• Independent and dependent

• Qualitative and quantitative

• Experimental and control

• Observed and not observed