Rock debris from space called enter Earth and are called . If they survive this fall and land on Earth, they are called .

Meteorites, I think it’s an asteroid when in space and a meteorite once it lands

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.