Across
- 2. A substance that cannot be changed or separated into other kinds of substances.
- 3. The smallest particle of an element that has the characteristics of that element.
- 5. A characteristic that can be observed without changing one kind of matter into another kind of matter.
- 7. Anything that has matter and takes up space.
- 9. Basic form in which matter exists, including solid, liquid, and gas.
Down
- 1. A characteristic that describes how one kind of matter changes into another kind of matter.
- 4. The center of an atom, which is made up of protons and neutrons.
- 6. A characteristic that describes matter.
- 7. Two or more elements or compounds mixed together, but not joined chemically.
- 8. A substance formed when the atoms of two or more elements join together chemically.