Experimental Design

Which of the following best describes a hypothesis?

• a complete guess

• the variable that is being tested by the researcher

• a testable explanation

• a conclusive statement made based on experimental results

Which of the following best describes an independent variable?

• a testable explanation

• the variable being tested

• the variable being measured

• the group that is a standard for comparison

Tags

NGSS.MS-PS3-4

Which of the following best describes a dependent variable?

• a testable explanation

• the variable being tested

• the variable being measured

• the group that is a standard for comparison

Which of the following best describes the control group?

• the group that is the standard for comparison

• the group that is used to test the effects of the independent variable

• the variables that are kept the same for all groups

• a testable explanation

Which of the following best describes the experimental group?

• the group that is the standard for comparison

• the group that is used to test the effects of the independent variable

• the variables that are kept the same for all groups

• a testable explanation

Tags

NGSS.MS-PS3-4

Which of the following best describes experimental constants or controls?

• the group that is the standard for comparison

• the group that is used to test the effects of the independent variable

• the variables that are kept the same for all groups

• a testable explanation

Tags

NGSS.MS-PS3-4

How many variables should be tested in an experiment?

• 1

• 2

• 3

• as many as you need to test

Tags

NGSS.HS-PS1-5

What is the purpose of a Chi-Square test?

• To compare means of two separate groups.

• To determine if there is a statistically significant difference between the observed and expected values in an experiment.

• To do extra math.

• To conclusively prove that your null hypothesis is true or false.

Which of the following pieces of data is quantitative?

• There were 7 heads and 3 tails when a coin was flipped 10 times.

• A coin has a heads side and a tails side.

• A coin is silver.

• A coin is heavy.

An experimenter was testing the effect of light distance on the the number of oxygen bubbles produced by a photosynthesizing aquatic plant. The researcher counted the number of bubbles produced at 10 successive distances. What type of data is this? What type of graph should be used?

• continuous, line

• continuous, bar

• categorical, bar

• categorical, line

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3