My sister needs this answered!

donald is creating an experiment to determine if fertilizer affects plant color. he makes this statement:
"if each plant receives a different amount of fertilizer,
then the plant's color intensity will change."
donald's statement is a proposed general relationship between fertilizer amount and plant color. this statement is best described as:

1) an error.
2) a hypothesis.
3) a prediction.
4) a question.

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

How does a nuclear reactor produce electricity? a. high-energy gamma rays are converted by a generator into electricity. b. the heat from the reaction turns water to steam, which runs a generator. c. the reaction produces a stream of electrons that flow through wires and into batteries. d. the heat released from the reaction is used to burn coal or gas to produce electricity. e. control rods absorb the neutrons emitted and release a stream of electrons as electricity.

Which kind of weather usually forms over the northwest united states in the summer because of maritime polar air masses? 1 )fog 2)dry heat 3) heavy snow 4) heavy rain