Question

1. what is the primary goal of a controlled - experiment?

a. to manipulate as many variables as possible
b. to isolate the effect of the independent variable on the dependent variable
c. to prove a hypothesis correct
d. to ensure the experiment cannot be replicated

1. which tool is considered the temperature sentinel in the lab?

a. centrifuge
b. thermometer
c. pipette
d. beaker

1. which of the following is an example of a qualitative data type?

a. length measurements
b. number of leaves
c. temperature readings
d. color of a solution

Explanation:

1. In a controlled - experiment, the primary goal is to isolate the effect of the independent variable on the dependent variable by keeping other factors constant.
2. A thermometer is a tool used to measure temperature, acting as a temperature sensor in the lab.
3. Qualitative data describes qualities or characteristics. The color of a solution is a qualitative property, while length, number of leaves, and temperature readings are quantitative.

Answer:

1. b. To isolate the effect of the independent variable on the dependent variable
2. b. Thermometer
3. d. Color of a solution