Across
- 1. states that mass is neither created nor destroyed during a chemical reaction but is conserved
- 4. a form of matter that has its own definite shape and volume, is incompressible, and expands only slightly when heated
- 8. gaseous state of a substance that is a liquid or a solid at room temperature
- 9. a process involving one or more substances changing into new substances; also called a chemical reaction
- 12. states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
- 14. a technique that uses a porous barrier to separate a solid from a liquid
- 16. the energy-requiring process by which a solid changes directly to a gas without first becoming a liquid
- 17. the physical forms in which all matter naturally exists on Earth—most commonly as a solid, a liquid, or a gas
- 22. a chart that organizes all known elements into a grid of horizontal rows (periods) and vertical columns (groups or families) arranged by increasing atomic number
- 24. a physical property, such as mass, length, and volume, that is dependent upon the amount of substance present
- 25. a characteristic of matter that can be observed or measured without changing the sample's composition—for example, density, color, taste, hardness, and melting point
Down
- 2. a uniform mixture that can contain solids, liquids, or gases; also called a homogeneous mixture
- 3. a percentage determined by the ratio of the mass of each element to the total mass of the compound
- 5. a mixture that does not have a uniform composition and in which the individual substances remain distinct
- 6. a form of matter that flows to conform to the shape of its container, fills the container's entire volume, and is easily compressed
- 7. a type of change that alters the physical properties of a substance but does not change its composition
- 10. a technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of a fixed substrate
- 11. a chemical combination of two or more different elements; can be broken down into simpler substances by chemical means and has properties different from those of its component elements
- 13. a form of matter that flows, has constant volume, and takes the shape of its container
- 15. mixture that has a uniform composition throughout and always has a single phase; also called a solution
- 18. a physical blend of two or more pure substances in any proportion in which each substance retains its individual properties; can be separated by physical means
- 19. the ability or inability of a substance to combine with or change into one or more new substances
- 20. a pure substance that cannot be broken down into simpler substances by physical or chemical means
- 21. a separation technique that produces pure solid particles of a substance from a solution that contains the dissolved substance
- 22. a transition of matter from one state to another
- 23. property a physical property that remains the same no matter how much of a substance is present