Parts of an Experiment

Which of these is an example of qualitative data?

• The number of students in the classroom.

• The amount of red fish in a fish tank.

• The varying degrees of smells when you walk into a bathroom.

• How many hairs your teacher has on his skull.

Which of these is quantitative data?

• The amount of petals that a flower blooms.

• The different shades of red that petals have.

• How rough a piece of wood is.

• How attractive someone finds someone else.

Which of these do you test to determine its accuracy?

• hypothesis

• control

• experiment

• conclusion

What kind of experiment has at least two groups, one of which does not receive the experimental treatment?

• controlled

• manipulated

• blind

• determined

Why are control groups important?

• They provide a basis of comparison.

• They make experiments more simple.

• They make the experimenter look smart.

• They are not important.

Identify the control group.

A woman dyes the hair of 10 women blonde. She uses ten different brands, and one woman does not die her hair. She seeks to determine which hair dye dries out the hair the most.

• The experimenter.

• The first woman to dye her hair.

• The woman that doesn't dye her hair.

• There is not a control group.

Which of these usually are relatively narrow in scope; theories have broad explanatory power?

• hypotheses

• theory

• law

• inference

How does the scientific method usually begin?

• observations

• hypothesis

• experiment

• data analysis

How do scientists ensure that their work can be repeated, their experimental procedures can be reviewed, and others can try to reproduce the results?

• They publish their work.

• They keep their experiment a secret.

• They do their experiment once.

• They perform their experiment in public.

Experiments must be....

• repeatable.

• simple.

• complex.

• performed only once.

Tags

NGSS.MS-PS1-2