Asked by Chandler Crouch on Jun 10, 2024
Verified
A scientist is investigating the results of varying temperature on the growth rate of a bacterial culture. In this experiment, temperature is the _____.
A) dependent variable
B) independent variable
C) control
D) model
E) hypothesis
Independent Variable
The variable in an experiment that is manipulated or changed by the researcher to observe its effects on the dependent variable.
Bacterial Culture
A procedure involving the growth of bacteria in a controlled and defined environment, usually on a nutrient media in a lab.
Growth Rate
The rate at which a population or an organism grows, usually expressed as a percentage per unit time.
- Comprehend the foundational principles of experimental design, encompassing both control and experimental cohorts.
Verified Answer
GG
Glory GraceJun 11, 2024
Final Answer :
B
Explanation :
In this experiment, the scientist is intentionally manipulating the temperature to see its effect on the growth rate of the bacterial culture. Therefore, temperature is the independent variable. The dependent variable is the growth rate, as it is the variable that is measured and observed in response to the change in the independent variable. A control is a standard for comparison in an experiment and a model is a simplified representation used to study complex systems, neither of which apply to the temperature in this experiment. A hypothesis is a tentative explanation for an observed phenomenon and is not the variable being manipulated in this experiment.
Learning Objectives
- Comprehend the foundational principles of experimental design, encompassing both control and experimental cohorts.