Describe in two-five-sentence paragraphs the characteristics a substance must have to be considered a mineral.

A Mineral can be identified if they have the following properties:

1) Naturally occurring: it should be present in nature on its own, steel is not a   mineral because it is made manually.

2) Inorganic it should not be produced by any organism

3) Solid It should not be in liquid or gaseous state, water is not a mineral because its liquid.

4) Definite chemical composition it should have a limited variation in its chemical properties.

5) Ordered internal structure it should have definite internal repeating structure that does not varies much.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

the answer to this question is 3.