Across
- 3. Those properties that a substance displays without changing its composition.
- 7. The SI standard unit of length.
- 8. A state of matter in which atoms or molecules are widely separated and free to move relative to one another.
- 9. The smallest identifiable unit of an element
- 10. Often the first step in the scientific method. It must be a measure or describe something about the physical world.
- 11. Prefixes used by the SI system with the standard units. These multipliers change the value of the unit by powers of 10.
- 13. A proposed explanation for observations and laws. It presents a model of the way nature works and predicts behavior that extends well beyond the observations and laws from which it was formed.
Down
- 1. Two or more atoms joined in a specific arrangement by chemical bonds. It is the smallest identifiable unit of a molecular compound.
- 2. A measure of space.
- 4. A substance that cannot be broken down into simpler substances.
- 5. A procedure that attempts to measure observable predictions to test a theory or law.
- 6. A change in which matter does not change its composition, even though its appearance might change.
- 9. A theory stating that all matter is composed of tiny particles called atoms
- 12. A measure of the quantity of matter within an object.