Question

Cathy designs an experiment to investigate how well cups made of different materials maintain the temperatures of a cold drink. Which step will increase the accuracy and validity of Cathy's results?

A) Conduct the experiment in a different location each time.
B) Use cups of the same material to ensure consistency.
C) Avoid recording any data or observations during the experiment.
D) Change the temperature of the cold drink during the experiment.

Answer 1

Cathy should use cups of the same material to ensure consistency and increase the accuracy and validity of her results in the experiment.

Step-by-step explanation:

To increase the accuracy and validity of Cathy's results in her experiment, she should use cups of the same material to ensure consistency.

By using cups of different materials, there may be variations in how well each material maintains the temperature of the cold drink. This would introduce an additional variable that could affect the results and make it difficult to compare and draw conclusions.

To ensure that only the material of the cup is being tested, Cathy should also take care to keep all other variables constant, such as the amount of liquid, the initial temperature of the drink, and the ambient temperature.