Science vocab

2. a substance that cannot be separated or broken down into simpler substances by chemical means
5. the state of matter that has a definite volume but not a definite shape
8. the amount of force exerted per unit area of a surface
9. bond an attraction between atoms or ions that holds them together, forming molecules and compounds, driven by the tendency to achieve lower, more stable energy states by sharing
12. substance a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
13. a form of matter that does not have a definite volume or shape
15. energy the total kinetic energy of a substance's particles
17. a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object

1. a group of atoms that are held together by chemical forces; a molecule is the smallest unit of a compound that keeps all the properties of that compound
3. a measure of the amount of matter in an object
4. the amount of space that an object takes up, or occupies
6. how much mass is packed into a certain volume, calculated as mass divided by volume
7. of state the change of a substance from one physical state to anothe
8. table a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in
10. anything that has mass and takes up space
11. the state of matter in which the volume and shape of a substance are fixed
14. a substance made up of atoms of two or more different elements joined by chemical bonds
16. the smallest unit of an element that maintains the properties of that element