Across
- 4. atoms are very close together
- 5. anything that has mass and takes up space
- 7. pure substances that are composed of two or more types of elements that are chemically conbined.
- 8. composed of two or more different substances that retain their own indivitual
Down
- 1. the smallest basic unit of matter.
- 2. atoms are freely moving about.
- 3. atoms are somewhat together
- 6. cannot be changed into simpler substances