Science

3. the mixture of gases around the earth
6. the act of changing something or changing your behavior to make it suitable for a new purpose or situation
11. the degree of hotness or coldness of an object
12. arge spectacles equipped with special lenses, protective rims, etc., to prevent injury to the eyes from strong wind, flying objects, blinding light, etc
13. the process of developing by gradual changes

1. A substance that cannot be broken down into simpler substances by chemical means
2. a measure of how acidic/basic water is
4. a group of planets and other bodies that revolve around a star
5. nonmetallic element of Group 15 [Va] of the periodic table
7. he yellowish, liquid part of your blood that carries blood cells, water, proteins, and clotting factors throughout your body.
8. any substance that has a defined composition
9. something having many related parts that function together as a whole
10. The smallest part of a substance that cannot be broken down chemically.