Rita is interested in finding out what brand of dry cell battery will power a motor longest before becoming depleted. She purchases the same size batteries in several different brands, making sure that their expiration dates are the same. She builds an oval track and measures its length. She puts a AA battery into a toy train, and allows it to run on the track. Rita counts the number of times the train goes around the track before stopping and records this number. She then repeats this process using a different brand of battery.





Read the information above. What is the dependent variable in this experiment?

A meteorologist wants to study the relationship between jet stream position and snow fall in an area



Refer to the information above. The statement: "There is a relationship between snowfall amounts in an area and jet stream position" is the ____ in the experiment.

A meteorologist wants to study the relationship between jet stream position and snowfall in an area.



Refer to the information above. Comparing jet stream position and snowfall for the same time period each time data is collected is a ____ in the experiment.

An oceanographer is collecting data over a two-week period to determine how wave height is affected by wind speed.



Refer to the information above. What data would be least important to record during measuring periods in this experiment?

An oceanographer is collecting data over a two-week period to determine how wave height is affected by wind speed.



Refer to the information above. Which of these factors should be held constant in the experiment?