Question

A student conducted an experiment to find out if air temperature affected the total number of seeds that germinate. Two groups of 20 identical seeds were used. One group was kept at a temperature of 10 degrees Celsius (ºC) and the other at a temperature of 20ºC. All other conditions were held constant. Observations made during the 25 days of the experiment are shown in the data table below. Which of the following is the test variable (independent variable) in this experiment?

Answer 1

25days using 20degree Celsius

Answer 2

The air temperature is the test variable.

Explanation: Many things could be changed to see how they affect other things. Variables are the name given to these fluctuating amounts. Any feature, characteristic, or circumstance that can exist in various amounts or types is considered a variable. Independent, dependent, and controlled variables are typically present in an experiment.

These are explained below:

• The variable that is altered by the scientist is the independent variable. A good experiment has only ONE independent variable in order to guarantee a fair test. The scientist records the data they get while altering the independent variable.
• The thing that reacts to an alteration in the independent variable is the dependent variable. When the independent variable is altered, the dependent variable is dependent upon or changes.
• You must keep track of the controlled variables just as closely as the dependent variables since they are amounts or items that you want to remain constant.

Given experiment is to focus change in air temperature, as it changes with changes in temperature, it is the test variable ( independent variable).

To learn more about independent and dependent variables, click on the following links:

https://brainly.in/question/27103334?msp_srt_exp=5

https://brainly.in/question/18495052

#SPJ3