Transcript 4.10 Density - Florida Virtual School

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4.10 Density
1.
2.
Density Facts
Density Facts
4.10 Laboratory Investigation: Density
Directions: Fill out the data tables and answer all questions below.
Part I: Calculating Density
1. How is the density of a substance calculated?
2. If the shape of an object is irregular, like a stone, how can you measure
its volume?
3. If the volume of a cube of wood is15.625 cm3 and its mass is 10.00
grams, show the calculation for the density of the wood.
4.10 Laboratory Investigation: Density
4. Based on the density of the wood that you calculated above, would the
wood float or sink if it is placed in a bowl of water? Explain your
answer. Remember that the density of liquid water is 1.00 g/cm3.
5. A marble or small sphere, made of stone, is found to have a mass of
3.05 grams. To find its volume, it is placed in a graduated cylinder that
originally contains 10.00 mL of water. When the marble is placed in the
graduated cylinder, the new volume of the water and marble together is
11.20 mL.
a. Calculate the volume of the marble (Be sure to include units).
b. Calculate the density of the marble (Be sure to include units).
Helpful Hints for Lab
 Higher the density, the object is lower in the
container.
 Lower the density, the object is higher in the
container.
 Here is a piece wood and a
stone in a container of
water.
 The stone has a lower
density compared to the
stone.
Choose Four Liquids and Predict
Pick four from list below: Fresh water, Salt water, Vegetable oil,
Rubbing alcohol, Dish soap, Honey, Corn syrup, Milk, Maple syrup
HINT!
Imagine slowly pouring the
four liquids you picked into
a container. Once they
settled which one would be
on the bottom? What would
the order be?
Prediction: Rank the
four liquids from
lowest density (top) to
highest density
(bottom)
Calculate the Density of Four Liquids You Picked
Liquid
Mass (g)
Volume (ml)
23.8 g
24 ml
2. Salt water
75 g
800 ml
3. Vegetable oil
150 g
50 ml
4. Rubbing
alcohol
.02g
10 ml
5. Dish soap
300 g
500 ml
6. Honey
454 g
480 ml
7. Corn syrup
69 g
50 ml
8. Milk
25 g
130 ml
481.82 g
360 ml
1. Fresh water
9. Maple syrup
Density
(g/ml)
D=M/V
What is the Order of the Four Liquids
Based on densities you calculated, what should the order be. Fill in
the chart below.
Rank the four liquids from
lowest density (top) to highest
density (bottom)
Add in Objects
Directions: If you added 4 objects
to your container of liquids where
would they settle? Use the
objects from the list on the right.
Rank the four
liquids from
lowest density
(top) to highest
density (bottom)
Objects (Decide
where each
object would
settle)
Object
1. Ping pong ball
Object Density
0.077 g/cm³
2. Small bolt
7.7 g/cm³
3. Popcorn kernel
1.3 g/cm³
4. Peanut
0.64 g/cm³
5. Blueberry
0.69 g/cm³
6. Grape
1.11 g/cm³
7. Cherry tomato
2.3 g/cm³
Observations and Conclusions
6a. Define density.
6b. Describe how this activity helps you compare
the density of four different liquids without
making mass measurements.
Observations and Conclusions
7a. How did the observations compare to your
predictions?
7b. Did any of the results surprise you?
Observations and Conclusions
8a. How would the density of water change if you
measured out ½ cup instead of ¼ cup?
8b. Explain your answer.
Guess what?!? You are DONE!
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