Question

c) a study on how the amount of mass carried on a remote control boat affects the speed of the boat. independent variable: dependent variable: controlled variables (3): control group:

Explanation:

The independent variable is what is changed in an experiment. Here, it's the amount of mass carried on the remote - control boat. The dependent variable is what is measured and affected by the independent variable, which is the speed of the boat. Controlled variables are factors kept the same to ensure a fair test. For the control group, it would be a group where the boat has no extra mass (or a standard amount of mass). Three possible controlled variables could be the type of boat, the motor power setting of the boat, and the water conditions (such as water depth and stillness) where the boat is tested.

Answer:

Independent variable: Amount of mass carried on the remote - control boat
Dependent variable: Speed of the boat
Controlled variables (3): Type of boat, Motor power setting, Water conditions
Control Group: Remote - control boat with no extra mass (or a standard amount of mass)