Research and Experiments

Is the underlined phrase the independent variable or the dependent variable?

Does the flavor of ice cream effect how fast the ice cream melts?

• Independent Variable

• Dependent Variable

Is the underlined phrase the independent variable or the dependent variable?

How does watching TV during studying affect a student’s test grades?

• Independent Variable

• Dependent Variable

You want to test which size of soccer ball is easiest to juggle with your feet. You test a size 3, size 4 and a size 5 ball. You count the seconds the ball stays in the air for each of the trials.

What is the independent variable?

• the size of the soccer ball

• The seconds the ball stays in the air

You want to test which size of soccer ball is easiest to juggle with your feet. You test a size 3, size 4 and a size 5 ball. You count the seconds the ball stays in the air for each of the trials.

What is the dependent variable?

• the size of the soccer ball

• the seconds the ball stays in the air

Does the size of a fish tank affect how large a fish will grow?

What is the dependent variable?

• how large the fish will grow

• the size of the fish tank

Does the size of a fish tank affect how large a fish will grow?

What is the independent variable?

• how large the fish will grow

• the size of the fish tank

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?

• speed of students working math problems

• the use of calculators

Marcel and his twin sister Marley both have the same science exam. Javier sleeps for 9 hours the night before the exam and his sister sleeps for 6 hours. After they take the test, they both compare their test grades. What is the independent variable?

• The number of hours of sleep they had

• The type of test

• The test grades

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5