A geologist fills three identical funnels with three different sizes of sandstone. Then, the geologist pours 500 mL of water into each funnel and measures how long it takes for the water to stop draining out of the bottom of the funnels.

A biologist cuts an African violet leaf into six equal-sized pieces. Then, the biologist carefully places the cuttings on six different petri plates, each filled with a different substance, and monitors the growth of the cuttings over the next several weeks.

A physicist places three identical glass rods in different beakers, each filled with a different liquid. Then, the physicist measures the angle of refraction in each scenario.

Which of the following statements is true based on the above information?
A.
Geologists, biologists, and physicists are only able to gather data through laboratory experiments.
B.
Variables and conditions cannot be controlled during a laboratory experiment.
C.
Laboratory experiments are a useful form of scientific investigation in many different fields of science.
D.
Physicists do not perform laboratory experiments as often as biologists and geologists.

The statements that are true from the information contained in the question is;

Geologists, biologists, and physicists are only able to gather data through laboratory experiments.

Laboratory experiments are a useful form of scientific investigation in many different fields of science.

The term experiment refers to the manner in which information could be obtained. We know that we are able to arrive at new knowledge in science by conducting carefully controlled experiments. In this experiment, there must be a dependent variable as well as an independent variable.

The independent variable is the variable that we are able to manipulate in the course of the experiment while the results that we obtain when we manipulate the independent variable affects the values of the dependent variable.

Hence, the statements that are true from the information contained in the question is;

Geologists, biologists, and physicists are only able to gather data through laboratory experiments.

Laboratory experiments are a useful form of scientific investigation in many different fields of science.

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