Determine the right answer to fill in the blank spaces List items: water, natural, particles, mixture, salt, made, identical, minerals, gases, sand, cotton
A pure substance is something that is entirely made up of that are to each other.
Any substance that is not pure, must be a .
We are surrounded by mixtures. The air is a mixture of . The oceans are a mixture of (mainly) and . The solid earth is mostly rock, which is a mixture of different .
ressources are substances we need and use, which occur naturally. Some come from living things, (example) other are non-living (example) .
The opposite of a natural resource is a resource.

Science