1
The air, water, and land in or on which people, animals, and plants live
2
A change from one form or type to another, or the process by which this happens
3
The process of judging or calculating the quality, importance, amount, or value of something
4
The doing of something, or something that you are doing, have done, or could do
5
To communicate with or react to each other
6
A usual or fixed way of doing things
7
Dealing with or treating the whole of something or someone and not just a part
8
The systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions.
9
To help someone or to give assistance to
10
A formal statement of ideas that are suggested to explain a fact or event, or how something works
