Which one are testable and non testable questions ? Does the temperature affect student performance?

How does the size of a helicopters blade length affect the speed and number of rotations?

Why does doing your homework help your grades?

Does the color of a surface affect it temperature? Do flying saucers really exit?

Do larger or smaller seeds make prettier flowers? Will larger or smaller seeds germinate faster?

Which planet is the most interesting to study? What happens if you don't eat breakfast?

Where are whales found in the world? How does talking to a plant affect a plants

height? Who do people smoke?

What types of apples grow in Missouri? Are there more seeds in Fuji apples or

Washington apples