Across
- 3. a substance that cannot be made into simpler substances by ordinary means
- 6. a substance made up of two or more elements chemically combined
- 7. a change that produces one or more kinds of matter that are different from those present before the change
- 9. a combination of two or more kinds of matter that can be separated by physical means
- 10. the direct change from a solid to a gas
- 12. phase of matter that doesn't have a definite shape or volume
- 14. the mass per unit volume of a substance
- 15. a hot gas of electrically charged particles
Down
- 1. a number written as the product of a coefficient between 1 and 10 and a power of 10
- 2. phase of matter that has a definite volume but not a definite shape
- 4. the temperature at which a gas changes to a liquid
- 5. has definite shape and a definite volume
- 8. anything has mass and takes up space
- 11. a change in which the appearance of matter changes but its properties and makeup remain the same
- 13. the numbers that a scientist reads and estimates on a scale