Question

Joseph studied whether different materials can block certain electromagnetic waves by testing television reception in different parts of the house. At each part of the house, Joseph used a different antenna. The experiment could have been improved by _______________________________.
Testing reception of a different channel during each trial.


Using the same antenna during each trial.


Measuring the antenna length in centimeters.


Measuring the distance to the television station.

Answer 1

Using the same antenna during each trial.