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

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.