Question

A student delivers balloons after school and notices the volume of the balloon often changes by the time he delivers them, depending on the season. He decides to measure the temperature and the volume of the balloon to see if there is a correlation. Which of the following would be a good control and constants for his experiment?

a) The control is a similar balloon left in the shop measured before and after the delivery. The constants are the type of balloon and the amount of gas put into the balloon.
b) The control is the amount of gas put into the balloon. The constants are the type of balloon, and the time of day for the delivery.
c) The control is the type of balloon. The constants are the day of the week he delivers, and the amount of gas in the balloon.
d) The control is a balloon measured in the shop each day. The constants are the time of day for the delivery and the kind of balloon.

Answer 1

In the student's experiment, the control should be a similar balloon left in the shop and measured before and after delivery. The constants should be the type of balloon used and the amount of gas put into the balloon. These variables should remain constant throughout the experiment to isolate the effect of temperature on the volume of the balloon.

Step-by-step explanation:

For the student's experiment, the control should be a similar balloon left in the shop and measured before and after delivery. This will provide a comparison to see if there are any changes in volume due to factors other than temperature. The constants should be the type of balloon used and the amount of gas put into the balloon. These variables should remain constant throughout the experiment to isolate the effect of temperature on the volume of the balloon.