5. What can scientists measure to provide evidence that electrons can move from one energy level to another?
1.the angle of deflection of alpha particles
2.the number of electrons deflected by a thin sheet of gold foil
3.the energy absorbed or released by atoms

It's number 2. It's an interesting experiment, you can watch multiple on

1.fossils 2.analogous organs 3.homologous organs

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the