Controls and Variables in Science
Explore the fundamental concepts of controls and variables in scientific experimentation with this comprehensive worksheet for Grade 9 science students.
Includes
Standards
Controls and Variables
Name:
Date:
Score:
Read each question carefully and provide your best answer. This worksheet will assess your understanding of controls and variables in scientific experiments.
1. In an experiment, what is the variable that is intentionally changed or manipulated by the experimenter?
Control variable
Dependent variable
Independent variable
Extraneous variable
2. Which of the following best describes the purpose of a control group in an experiment?
To introduce additional variables
To serve as a baseline for comparison
To manipulate the dependent variable
To confuse the experimental results
1. The variable that is measured or observed in an experiment is called the variable.
2. Factors that are kept the same throughout an experiment to ensure a fair test are known as .
3. A hypothesis is an educated guess or about the outcome of an experiment.
1. In an experiment, it is ideal to have multiple independent variables.
True
False
2. A controlled experiment helps to establish a cause-and-effect relationship.
True
False
1. Explain the difference between an independent variable and a dependent variable in your own words.
2. Why is it important to have controlled variables in a scientific experiment?
Design a simple experiment to test the effect of different amounts of sunlight on plant growth. Identify the independent variable, dependent variable, and at least three controlled variables.
Independent Variable:
Dependent Variable:
Controlled Variables: