Variables in Experiments
Biology ⇒ Scientific Inquiry and Experimental Design in Biology
Variables in Experiments starts at 6 and continues till grade 12.
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See sample questions for grade 9
A researcher wants to know if the amount of sugar in water affects the time it takes for yeast to produce carbon dioxide. What is the dependent variable?
A scientist is testing the effect of different amounts of salt on the boiling point of water. What is the dependent variable?
A student is testing how the amount of fertilizer affects the number of flowers produced by a plant. What is the independent variable?
A student wants to test if fertilizer affects the height of tomato plants. What is the dependent variable in this experiment?
A researcher wants to know if the amount of sugar in water affects the time it takes for yeast to produce carbon dioxide. What is the dependent variable?
A scientist is testing the effect of different amounts of salt on the boiling point of water. What is the dependent variable?
A student is testing how the amount of fertilizer affects the number of flowers produced by a plant. What is the independent variable?
A student wants to test if fertilizer affects the height of tomato plants. What is the dependent variable in this experiment?
What is the variable that is deliberately changed or manipulated in an experiment called? (1) Dependent variable (2) Independent variable (3) Controlled variable (4) Random variable
Which of the following best describes a controlled variable? (1) A variable that is changed (2) A variable that is measured (3) A variable that is kept the same (4) A variable that is ignored
Which of the following best describes a dependent variable? (1) The variable you change (2) The variable you measure (3) The variable you ignore (4) The variable you control
Which of the following is an example of a controlled variable? (1) The amount of fertilizer used (2) The type of plant used (3) The height of the plant (4) The number of leaves counted
Fill in the blank: In a fair test, only the __________ variable should be changed.
Fill in the blank: In a graph, the dependent variable is usually plotted on the __________ axis.
Fill in the blank: In a scientific experiment, the variable that is kept constant to ensure a fair test is called a __________ variable.
Fill in the blank: The variable that is manipulated by the experimenter is the __________ variable.
Is it important to have only one independent variable in a fair test? Yes or No.
Is it necessary to record all variables in an experiment? Yes or No.
Is it possible to have more than one dependent variable in an experiment? Yes or No.
Is the following statement true or false? The independent variable is always plotted on the x-axis of a graph.
