Density Worksheet - Mrs. Spock 8th Grade Science



Name:_______________________

Date:________________________

Period: ______________________

Density Worksheet - HONORS

Directions: Read the question carefully and show all of your work by: 1) writing the formula, 2) substituting in the known values, and 3) circling the answer (including units)!

1. An aluminum bar was measured on an electronic balance. It had a mass of 14.25 grams. The volume was found using measurement and formulas. Its volume was 5.26 cm3. What is the density of the aluminum bar?

2. A copper penny has a volume of .36cm3 and a density of 8.54 g/cm3. What is the mass of the penny?

3. What is the volume of 25.00 grams of oil if its density is 0.843 g/ml?

4. Which object is denser, 100 cm3 of wood that weighs 61 grams, or 10 grams of water that has a volume of 10 ml?

5. Fifty ml of water was poured into a graduated cylinder. A small rock was put into the graduated cylinder and the water rose to 87 ml. Calculate the volume of the rock.

If the rock has a mass of 36.02 g, what is its density? (Hint: Use the volume you calculated!)

6. Lead is considered a “heavy” metal. What is the density of a block of lead that has a volume of 10 cm3 and a mass of 113.5 grams?

7. If you cut the sample of lead from question #7 in half, what would be the density of the lead?

8. Iron has a density of 7.6 g/cm3. How big (what is its volume?) will a 500 g sample be?

9. Density depends on both the________________ and the ________________of a substance.

|Density is characteristic property of substances. It doesn’t vary because of the size or shape of an object. Water| |

|has the same density whether it’s one drop of water or a glassful of water. Density describes how tightly matter is | |

|packed in a material; density is how heavy something is for its size. The units of measurement for density, g/cm3, | |

|show that density is calculated by dividing the mass (g) of an object by its volume (cm3). The magic triangle shows | |

|the relationship between mass, volume, and density. | |

|Substance |Density (g/cm3) |Mass (g) |Volume (cm3) |

| |_____________ |1070 |50 |

|10.Platinum | | | |

| |19.3 |_____________ |15 |

|11. Gold | | | |

| |13.6 |952 |_____________ |

|12. Mercury | | | |

| |11.3 |_____________ |30 |

|13. Lead | | | |

14   Given a large beaker of water at room temperature (20 C), draw the approximate position of the following objects when placed in that beaker of water and explain why you placed them as you did.   (In each case draw a beaker of water and the object’s approximate position you are placing in it.)  

a.)   styrofoam (D = .05 g/cm3)

b.)   ice  (D = 0.92 g/cm3)

c.)   bone (D = 1.70 g/cm3

d.)   zinc (D = 7.1 g/cm3)

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