Question

the diagram shows an investigation conducted to determine which liquid will evaporate fastest.
how could the setup of the investigation be changed to be more accurate and effective?
cover each container with a lid.
measure relative temperatures with a thermometer.
use a different size container for each liquid.
use the same amount of liquid in each container.

Explanation:

Step1: Analyze the variables

In an experiment to determine which liquid evaporates fastest, to ensure accuracy, variables like the amount of liquid should be controlled. Using the same amount of liquid in each container (a control variable) helps in a fair comparison.

Step2: Evaluate other options

• Using different - size containers (affects surface - area - to - volume ratio which is a confounding variable).
• Measuring relative temperatures with a thermometer (temperature is not the variable of interest in the original setup about which liquid evaporates fastest, and if not related to evaporation rate measurement in this context, it's not helpful).
• Covering each container with a lid (prevents evaporation, which is the opposite of what we want to study).

Answer:

Use the same amount of liquid in each container.