Across
- 3. Combination of two or more different elements.
- 7. Description of what scientists find happening in nature repeatedly in the same way, without known exception.
- 9. Change in the chemical composition of a substance.
- 10. Combination of two or more atoms of the same or different elements held together by chemical bonds.
Down
- 1. The basic building block of matter.
- 2. Process that occurs when an output of matter, energy, or information is fed back into the system as an input and leads to changes in that system.
- 4. Energy generated and measured by heat.
- 5. Factual information collected by scientists.
- 6. Energy associated with motion, such as energy in flowing water, a speeding car, or electricity.
- 8. One of two or more forms of a chemical element that have the same atomic number but different mass numbers.