Questions: Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne. What is the test variable (independent variable) in Omar's experiment? A. the materials out of which the rockets were made B. the force with which each rocket is launched C. the masses of the model rockets D. the time the rockets remain airborne

Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne.

What is the test variable (independent variable) in Omar's experiment?
A. the materials out of which the rockets were made
B. the force with which each rocket is launched
C. the masses of the model rockets
D. the time the rockets remain airborne

Transcript text: Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne. What is the test variable (independent variable) in Omar's experiment? A. the materials out of which the rockets were made B. the force with which each rocket is launched C. the masses of the model rockets D. the time the rockets remain airborne

Solution

Solution Steps

Step 1: Understand the Experiment

Omar's experiment aims to determine if the mass of a model rocket affects the duration it stays airborne. He uses three identical rockets and adds varying amounts of sand to two of them to change their mass.

Step 2: Identify the Test Variable

The test variable, also known as the independent variable, is the factor that is changed or controlled in an experiment to test its effects on the dependent variable. In this case, Omar is changing the mass of the rockets by adding sand.

Step 3: Determine the Independent Variable

The independent variable in Omar's experiment is the masses of the model rockets, as this is the factor he is varying to observe its effect on the time the rockets remain airborne.

Final Answer

\(\boxed{\text{C. the masses of the model rockets}}\)

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