Which question is the best to investigate using the scientific method? A. How many elephants are living in Africa at the present time?

B. How long ago did dinosaurs live on Earth?

C. Does the amount of salt added to water affect the time in which the water boils?

D. Who invented the first telescope?

double the distance = divide strength by 4

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.