science

4. a mixture of non-uniform composition and of which the components can be easily identified
6. the process during which a solid changes directly into a gas without passing through an intermediate liquid phase
7. . the temperature of a liquid at which its vapour pressure equals the external pressure
9. the process by which a liquid changes to a solid by the removal of heat
12. a substance that cannot be separated into simpler components by physical methods
13. pure substance consisting of two or more different atoms
14. . the process during which a gas changes to a liquid, either by cooling or by being subjected to increased pressure
16. a pure substance consisting of one type of atom
17. a material that prevents the flow of charge
19. a material that allows the flow of charge
20. . the process during which a solid changes to a liquid by the application of heat
21. the mass per unit volume of substance
22. the temperature at which a liquid changes to a solid by the removal of heat

1. ability to be hammered or pressed into shape without breaking or cracking
2. substance that can conduct electricity under some conditions, but not others, making it a good medium for the control of electrical current
3. the temperature at which a solid, given sufficient heat, becomes a liquid
5. . a mixture of uniform composition and in which all components are in the same phase
8. . a material that allows heat to pass through easily, thermal insulator does not allow heat to pass though it
10. the movement of atoms or molecules from an area of higher concentration to a area of lower concentration
11. the random movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of the liquid or gas
15. ability to be stretched into wire
16. the change of a liquid into a vapour at any temperature below the boiling point
18. hard but likely to break easily