Astudent wanted to test how the mass of a paper airplane affect the distance it will 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. independent variable: dependent variable: control: constant:

A scientific experiment is designed in a way that it should test all the variables - independent, dependent and control variables.

The independent variable can be manipulated and changes with the time on its own or manually. The dependent variable s he variable which is tested in the experiment and the constant variable is kept the same throughout the experiment.

The control in an experiment is a group of samples in which the variable to be studied is not included and this acts as a reference to the experimental setup.

Therefore in the given question,  

1. Independent variable- the number of clips added  

2. Dependent variable- the distance covered by the paper plane

3. Control: not mentioned in the question.

4. Constant: the applied force on the place.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2