Mr. Cruzado wanted to investigate whether the number of times students studied for their fourth periodic test would affect their class standing. Which of the following is NOT a controlled variable in this sample problem?

A. Time
B. Subject Matter
C. Students
D. The test

Mr. Cruzado wanted to investigate whether the number of times students studied for their fourth periodic test would affect their class standing. What is the DEPENDENT VARIABLE in the experiment?

A. Class standing
B. Amount of time students studied
C. Students
D. The test

Which of the following refers to an intelligent guess that is formulated and temporarily adapted to explain the observed facts covered by the study?

A. Research Title
B. Statement of the Problem
C. Hypothesis
D. Research Objectives

Why is it important to have well-formulated research questions?

A. It gives clarity to the research process and what you wish to research.
B. It leads to more focused research.
C. It provides more structure to your work.
D. All of the above.

In a study about headaches, doctors gave patients Alieve, Tylenol, Advil, and Excedrin, to see which medication would relieve the headache pain the fastest. The doctors timed how long it took the medication to work. What is the INDEPENDENT VARIABLE in the experiment?

A. Type of pain reliever
B. Amount of time until the pain was relieved
C. Amount of medication
D. Headaches

What happens to the dependent variable in a controlled experiment?

A. It does not change.
B. It is supported or disproved.
C. It changes as the independent variable changes.
D. It changes as the responding variable changes.

Mr. Cruzado wanted to investigate whether the number of times students studied for their fourth periodic test would affect their class standing. What is the INDEPENDENT VARIABLE in the experiment?

A. Class standing
B. Amount of time students studied
C. Students
D. The test

Scientists wanted to determine the levels of pollution that a fish could withstand. They placed fish in tanks with differing pollution levels and timed how long they could live under those conditions. What is the INDEPENDENT VARIABLE?

A. Level of pollution
B. Amount of time before death.
C. Type of fish
D. Type of pollution

Grade 7 students use different types of insect killers on mosquitoes to see which one kills the most mosquito. Which is the INDEPENDENT VARIABLE in the experiment?

A. Most mosquitoes
B. Types of insect killers
C. Types of insects
D. Number of mosquitoes killed

In a study about headaches, doctors gave patients Alieve, Tylenol, Advil, and Excedrin, to see which medication would relieve the headache pain the fastest. The doctors timed how long it took the medication to work. What is the DEPENDENT VARIABLE in the experiment?

A. Amount of medication
B. Type of pain reliever
C. Headaches
D. Amount of time until the pain was relieved

What is the name of the variable kept the same in an experiment?

A. Independent Variable
B. Controlled Variable
C. Constant Variable
D. Dependent Variable

A farmer applies different fertilizers to his cotton crops, to see which will make his plants grow the highest. Which of the following is the INDEPENDENT VARIABLE in this experiment?

A. Height of plants
B. Growth of plants
C. Type of fertilizer
D. Different cotton crops

Scientists wanted to determine the levels of pollution that a fish could withstand. They placed fish in tanks with differing pollution levels and timed how long they could live under those conditions. What is the DEPENDENT VARIABLE?

A. Level of pollution
B. Amount of time before death.
C. Type of fish
D. Type of pollution

Which of the following best describes a hypothesis?

A. A statement that you set out to prove.
B. Tested by collecting only the data that support it.
C. Proposed before a good research question can be developed.
D. Posts a clear relationship between different factors.