Three Types of Variables Science Process Skills. Three types of Variables In a science investigation there are three types of variables In a science investigation.

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Presentation transcript:

Three Types of Variables Science Process Skills

Three types of Variables In a science investigation there are three types of variables In a science investigation there are three types of variables Independent Variable – the factor or condition that is intentionally changed by an investigator. Independent Variable – the factor or condition that is intentionally changed by an investigator. Dependent Variable – the factor or condition that might be affected as a result of the independent variable Dependent Variable – the factor or condition that might be affected as a result of the independent variable Controlled Variables – the factors or conditions that are not changed. These variables are held constant Controlled Variables – the factors or conditions that are not changed. These variables are held constant

Three Types of Variables A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly. A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly. What was changed? Number of paper clips (mass of plane) Independent Variable What would you measure? The distance the plane flew ( Responding variable) What was held constant? Paper, folding, thrower (Constant Variables)

Three types of Variables Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators. Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators. What is the independent Variable? What is the dependent Variable? What are the constant Variables?

Three types of Variables Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. What is the independent Variable? What is the dependent Variable? What are the constant Variables?