Across
- 2. The basic particle from which all elements are made.
- 5. The study of the properties of matter and how matter changes.
- 7. A substance that cannot be broken down into any other substance by chemical or physical means.
- 9. The amount of matter in an object.
- 12. How hot or cold something is.
- 15. The force of attraction that holds two atoms together.
Down
- 1. Symbols that show the elements in a compound and the ratio of atoms.
- 3. A neutral group of two or more atoms held together by covalent bonds.
- 4. A change in which energy is released.
- 6. Anything that has mass and takes up space.
- 8. Two or more substances that are together in the same place but their atoms are not chemically bonded.
- 10. A single kind of matter that is pure and has a specific set of properties.
- 11. A change that alters the form or appearance of a material but does not make the material into another substance.
- 13. The total energy of the motion of all the particles of an object.
- 14. A measure of the force of gravity acting on an object.