scientists find dense rock on earths surface that is made of magnesium and smaller parts of alumminum and silicon. what layer of earth might help this rock help study? explain youre reasoning

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

Photosynthesis converts solar energy into what type of energy? o a. chemical energy o b. electron energy o c. water energy o d. photon energy

Living things that cannot make there own food are called what