It is letter C: Continental crust is thicker than oceanic crust.
Answer:
Spectroscopy
Explanation:
They can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy
Answer:
Solid, Liquid, Gas
Hope it helps! ^^
I think the number of protons in the nucleus the number of valence electrons atomic mass...