Both oceanic and continental crust.
I hope this helps!
For a simple harmonic motion energy is given with:

Where k is a constant that depends on the type of the wave you are looking at and A is amplitude.
Let's calculate the energy of the wave using two different amplitudes given in the problem:

We can see that energy associated with the wave is 4 times smaller when we decrease its amplitude by half. So the answer should be C.
Its just Calcium Flouride because as you can see it is an Ionic bond (Ca is metal and fl is a gas usually)
C. The water cycle spreads water out evenly around the whole Earth
Answer:b) atoms
Explanation:which are in turn made up of protons, neutrons and electrons