Question

question 3 of 10
pedro is planning to model how changes in weather affect evaporation from lakes. for his first experiment, he wants to test how humidity affects the evaporation rate. he places a beaker with 300 ml of water in a dry area, and he places another beaker with 300 ml of water near a humidifier.
which of the following variables does pedro need to control during his experiment?
a. humidity and evaporation rate
b. humidity only
c. volume of water and temperature
d. volume of water only

Explanation:

In an experiment to test how humidity affects evaporation rate, humidity is the independent variable and evaporation rate is the dependent variable. Other factors like volume of water and temperature that could influence evaporation should be controlled. Volume of water is already set to 300 mL for both set - ups, but temperature also affects evaporation and needs to be controlled.

Answer:

C. Volume of water and temperature