Choose "extinct" if the species is extinct and "endangered" if the species is endangered.

sixty years ago, as few as 20 whooping cranes were left on earth. now, to conservation efforts, there are more than 300 whooping cranes in the wild.

a. extinct

b. endangered

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.

pretty sure it's false