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

We are surrounded by mixtures. The air is a mixture of gases . The oceans are a mixture of (mainly) water and salt. The solid earth is mostly rock, which is a mixture of different minerals.

Natural resources are substances we need and use, which occur naturally. Some come from living things, (example) cotton other are non-living (example) sand.

The opposite of a natural resource is a made resource.