M) A team of scientists at a research laboratory is conducting a study on the effects of different

Question

concentrations of a drug on bacterial growth. They need to accurately measure and prepare
precise concentrations of the drug solution for their experiments. Which of the following tools
will be needed? (1 point)
A data collection probe
A thermometer
A water bath
A digital balance
N) In a scientific experiment, what is the role of the independent variable? (1 point)
It is the variable that is manipulated or changed by the researcher to observe its effect on the
dependent variable.
It is the variable that is kept constant throughout the experiment.
It is the variable that cannot be controlled or measured during the experiment.
O) In a controlled scientific experiment investigating the effect of light intensity on plant growth,
which of the following best describes the dependent variable? (1 point)
The amount of water given to each plant daily.
The height of the plants measured at the end of the experiment.
The light intensity each plant is exposed to during the experiment.
The type of soil used for all plants in the experiment.

Answer 1

M) To accurately measure and prepare precise concentrations of the drug solution for their experiments, the researchers will need a digital balance. This tool is essential for measuring the mass of the drug to create the desired concentrations.

N) In a scientific experiment, the role of the independent variable is: It is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.

O) In a controlled scientific experiment investigating the effect of light intensity on plant growth, the best description of the dependent variable is: The height of the plants measured at the end of the experiment. This variable depends on the changes made to the independent variable (light intensity).