Free STEMscopes Scientific Inquiry and Methodology Questions and Answers

Question 1

What is a hypothesis?

Accepted Answer

A testable prediction

Answer

A hypothesis is a testable prediction or a proposed explanation for an observation or phenomenon. It is typically formulated as an 'if-then' statement and serves as a starting point for scientific investigation. A hypothesis is not a proven fact but rather an educated guess that can be supported or refuted through experimentation and data collection.

Question 2

In an experiment, what is the independent variable?

Accepted Answer

The variable that is changed or manipulated

Answer

In an experiment, the independent variable is the factor that the experimenter intentionally changes or manipulates. It is the 'cause' in a cause-and-effect relationship being investigated. By altering this variable, researchers aim to observe its effect on the dependent variable.

Question 3

What is the dependent variable in an experiment?

Accepted Answer

The outcome that is measured

Answer

The dependent variable in an experiment is the outcome that is measured or observed. It is the 'effect' that responds to changes in the independent variable. Researchers analyze the changes in the dependent variable to draw conclusions about the impact of the manipulated independent variable.

Question 4

Why is it important to have a control group in an experiment?

Accepted Answer

To provide a baseline for comparison with the experimental group

Answer

A control group is essential in an experiment because it provides a baseline for comparison with the experimental group. The control group does not receive the treatment or manipulation of the independent variable. This allows researchers to isolate the effect of the independent variable, ensuring that any observed changes in the experimental group are indeed due to the variable being tested and not other extraneous factors.

Stemscopes Exam Practice Test

Stemscopes Exam Practice Test

Free STEMscopes Scientific Inquiry and Methodology Questions and Answers