Is every atom on the earth the same ? Explain why? Please helppp

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?