1. Physical properties Physical property: a property that can be observed without changing the identity of the substance.

2. Science Starter Week 5 Explain the difference between weight and mass.

3. Examples of physical properties -Color-state of matter -Size-ductility -Shape-density -Odor-malleability -Mass-thermal conductivity -Volume -Magnetism -solubility

4. malleability: the ability to be hammered into a thin sheet

5. ductility: the ability to be stretched into a wire

6. 5 states of matter Solid Liquid Gas Plasma Bose-Einstien condensate

7. States of matter

8. States of matter - solids definite volume Definite shape. packed close together (very dense) movement is very small and cannot be observed under ordinary conditions. examples:

9. States of matter - liquid definite volume take the shape of their container. particles touch and move around. densities of liquid will be close to that of a solid (dense) molecules can move by flowing examples:

10. States of matter - gas no definite volume No definite shape spread out indefinitely or take the shape of their container. low density Examples:

11. States of matter – plasma Plasma is super charged gases Plasmas are the most common state of matter in the universe comprising more than 99% of our visible universe and most of that not visible. occurring in the sun, flames, lightning and the auroras Very very low density

12. States of matter – Bose-Einstein condensate can be thought of as the opposite of a plasma. It occurs at ultra-low temperature, close to the point that the atoms are not moving at all. gaseous superfluid phase formed by atoms cooled to temperatures very near to absolute zero phenomenon was predicted in the 1920s by Satyendra Nath Bose and Albert Einstein

13. Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure water = 0 o C 32F

14. Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure water = 100 o C 212F

15. specific heat

16. solubility

17. Density Density is the amount of mass per unit of volume. Density can be used to identify a substance. The density of water is 1.0g/mL

18. Density Calculations Calculations: D = m/V = g/mL = g/cm 3 Ex: A cube has a mass of 2.8 g and occupies a volume of 3.67 ml. Would this object float or sink in water? Mass = 2.8 gVolume = 3.67 mL D = 2.8g/3.67 mL= 0.76 g/mL – This object would float in water because its density is less than water (1.0 g/mL).

19. More Density Calculations Ex: A liquid has a mass of 25.6 g and a volume of 31.6 mL. Use the table below to identify the substance. M=25.6 gV=31.6 mL D = 25.6 g/31.6 mL D= 0.81 g/mL The substance is ethanol.

20. Physical changes