Quiz on Variables

Which of the following is not a step in the scientific method?

• stating/writing your hypothesis

• analyzing the data from the experiment

• public opinion survey

• developing a testable question

The procedures are a -

• step by step set of instructions for conducting the experiment

• a question with independent and dependent variables

• an educated guess that can be tested

• graphs and charts based on data collected in the experiment

A scientist discovers new results in an experiment and communicates those results with peers. If the results are valid, then other scientists should be able to -

• repeat the experiment under different conditions and obtain the same results

• repeat the experiment under the same conditions and obtain the same results

• change the independent variable and obtain the same results

• none of the above

Tags

NGSS.MS-PS1-2

A theory is an educated guess about the outcome of an experiment.

• True

• False

An investigation was designed to study the effects of ultraviolet light on ferns. Two groups of ferns were grown under identical conditions, except one group was exposed to UV light, while the other was grown in total darkness. In this experiment, the ferns grown without any UV light are known as the -

• limiting factor.

• hypothetical group.

• dependent variable.

• control.

A student is investigating horsepower in trucks. She proposes the following question: How does amount of horsepower affect the pulling ability of the truck? What is the INDEPENDENT variable? Mark only one oval.

• the amount of horsepowers

• the brand of the truck

• changing speeds of trucks

• pulling capability of the truck

Tags

NGSS.MS-PS2-2

Which variable is carefully and originally changed or adjusted by the investigator in a controlled manner? Mark only one oval.

• dependent variable

• independent variable

• controlled variable

• hypothetical variable

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

A student is investigating snails and sunlight. What would be the best hypothesis for this experiment? Mark only one oval.

• Does the amount of light affect the size of snails?

• Why do snails like sunlight?

• Snails do not prefer sunlight.

• If sunlight is increased, there is more movement in snails.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What happens to the independent variable in an experiment? Mark only one oval.

• it equals the hypothesis

• it is control group

• it remains constant

• it is purposely and carefully changed

Tags

NGSS.MS-PS2-2

Why can't more than one variable be changed during an experiment? Mark only one oval.

• You need to make sure your results match your hypothesis.

• Changing two or more variables makes it difficult to find a cause and effect relationship.

• Change two or more variables would take longer.

• Changing two or more variables would make the experiment more precise.

Tags

NGSS.MS-PS3-4