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The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?