Science words

3. a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms.
5. a volatile chemical compound that humans and other animals perceive via the sense of smell or olfaction.
7. a process that leads to the chemical transformation of one set of chemical substances to another.
11. to become broken up or absorbed by something or to disappear into something else.
12. a substance that takes part in and undergoes change during a reaction.
15. a measure of a fluid's resistance to flow.
16. one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life like solid, liquid, gas, and plasma.
17. a liquid chemical containing hydrogen and oxygen and used for bleaching and as an antiseptic.

1. a form of matter having constant chemical composition and characteristic properties.
2. the species formed from chemical reactions.
4. the smallest unit of ordinary matter that forms a chemical element.
6. the characteristics that enable us to differentiate one material from another.
8. a group of two or more atoms held together by attractive forces known as chemical bonds.
9. mass of a unit volume of a material.
10. is the quality of burning or igniting easily in air.
13. a colorless odorless gaseous chemical element that makes up 78 percent of the atmosphere.
14. a material made up of two or more different chemical substances which are not chemically bonded.
18. a chemical element that constitutes 21 percent of the Earth's atmosphere.