Describing Describing MatterMatter

Slide Quiz over pages 11-14Slide Quiz over pages 11-14

Physical Physical PropertiesProperties

1. Which of the following is a physical property?A. volumeB. colorC. odorD. massE. all of the above

2. __________ is the physical form in which a substance exists, such as a solid, liquid, or gasA. densityB. solubilityC. DuctilityD. StateE. Malleability

3. To find an object’s density, you must know its _________

A. massB. volumeC. both mass and volumeD. neither its mass or volume

4. Give three physical properties about yourself.

5. Of the six physical properties listed above, which is the most useful for identifying substances? Explain why!

Sinkers are made of lead because lead is more dense than water

Mass per unit volumeDensity

Sugar dissolves in waterThe ability to dissolve in another substance

Solubility

Copper is often used to make wiring

The ability to be drawn or pulled into a wire

Ductility

Aluminum can be rolled or pounded into sheets to make foil.

The ability to be pounded into thin sheets

Malleability

Lice is water in its solid state

The physical form in which a substance exists, such as a solid, liquid, or gas

State

Plastic foam is a poor conductor, so hot chocolate in a plastic-foam cup will not burn your hand

The ability to transfer thermal energy from one area to another

Thermal conductivity

ExampleDefinitionPhysical Property

6. Take a look at the two boxes below. Each box has the same volume. If each ball has the same mass, which box would weigh more? Why?

Box A Box B

7. What would be the relative density of an object that floats in mercury but sinks in water?

8. Why does a helium balloon float in oxygen?

19.32Gold (solid)7.13Zinc (solid)

13.55Mercury (liquid)

5.02Iron pyrite (solid)

11.35Lead (solid)1.00Water (liquid)

10.50Silver (solid)0.001331Oxygen (gas)

8.96Copper (solid)0.0001663Helium (gas)

Density

(g/cm3)

SubstanceDensity

(g/cm3)

Substance

Densities of Common Substances at 20 degrees Celsius

9. Using the chart above, which solid would sink the fastest when placed in water? Explain why!

10. Which pennies have more copper---pennies minted before 1982 which have a density of 8.85 g/cm3, or pennies minted after 1982 which have a density of 7.14 g/cm3. Explain your answer.

19.32Gold (solid)7.13Zinc (solid)

13.55Mercury (liquid)

5.02Iron pyrite (solid)

11.35Lead (solid)1.00Water (liquid)

10.50Silver (solid)0.001331Oxygen (gas)

8.96Copper (solid)0.0001663Helium (gas)

Density

(g/cm3)

SubstanceDensity

(g/cm3)

Substance

Densities of Common Substances at 20 degrees Celsius

11. What is the equation for density?

12. What is the density of a block of pine wood with a mass of 120 grams and a volume of 300 cm3?

13. Would this block float or sink? Why??