Experimental Design Review

Front

What is an independent variable in an experiment?

Back

The independent variable is the one that is deliberately changed or manipulated by the scientist to observe its effect on the dependent variable.

Front

How many variables can be tested in a controlled experiment?

Back

In a controlled experiment, only one variable can be tested at a time to ensure that the results are due to that variable alone.

Front

What is a hypothesis?

Back

A hypothesis is a possible explanation for a problem or phenomenon that can be tested through experimentation.

Front

What can be inferred about E. coli bacterial growth in relation to temperature?

Back

E. coli does not grow well at low and high temperatures; it has an optimal temperature range for growth.

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the variable that is measured or observed in an experiment, and it is affected by changes in the independent variable.

Front

What is the purpose of a control group in an experiment?

Back

The control group serves as a baseline to compare the effects of the independent variable, ensuring that the results are due to the variable being tested.

Front

Define 'data' in the context of an experiment.

Back

Data refers to the information collected during an experiment, which can be quantitative (numerical) or qualitative (descriptive).

Front

What is the difference between a theory and a hypothesis?

Back

A hypothesis is a testable prediction about a specific situation, while a theory is a well-substantiated explanation of an aspect of the natural world that is based on a body of evidence.

Front

Why is it important to have a controlled environment in experiments?

Back

A controlled environment minimizes external factors that could influence the results, allowing for a clearer understanding of the relationship between the independent and dependent variables.

Front

What is the significance of replicating experiments?

Back

Replicating experiments is important to verify results and ensure that findings are consistent and reliable.