Density
Ice and Water
Comparing Densities
Sink or Float?
Grab Bag!
100
How are mass, density, and volume related mathematically?
D= m/v
100
Will 100 grams of water or 100 grams of ice have a larger volume?
Ice because water expands when it freezes.
100
What has a higher density? Bricks with a density of 1.84 g/cm3, or silver with a density of 10.50 g/cm3?
Silver
100
If a can of regular soda sinks in a tub of water and a can of diet soda floats, what can you say about the densities of the sodas?
They are different. The diet soda is less dense than the regular soda.
100
In what direction does buoyant force exert itself?
In the direction opposite to gravity.
200
What two properties do you need to know in order to calculate the density of an object?
Mass & Volume
200
If there is a large beaker of pure water and a small beaker of pure water, what property do both samples have in common?
The water has the same density.
200
Differences in what physical property causes liquids to separate into different layers?
Density
200
If an object has a density of 0.8 g/cm3, what will happen when it is placed into a tub of water? Explain.
It will float because it is less dense than water.
200
If an object has a mass of 27 g and a volume of 54 cm3, will it sink or float in a tub of water?
It will float because it has a density of .5 g/cm3.
300
If a drinking glass falls and breaks, each piece of glass is going to have what property in common?
Density
300
Explain why icebergs float in the ocean.
Ice is less dense than water or the water in the ocean is producing a buoyant force that is pushing upwards on the iceberg.
300
Explain why oil floats when mixed with water.
Oil is less dense than water.
300
If an object has a mass of 110 g and a volume of 100 cm3, will the object sink or float in a tub of water?
It will sink because it has a density of 1.1 g/cm3.
300
What tool would you use to find the mass of an object.
Scale or Triple Beam Balance.
400
If the volume of a sample of an element is 5 cm3, and the density is 7 g/cm3, what is the mass of the sample?
35 g
400
Explain what makes water so different than other liquids. Hint: It is the only liquid to do something...
It undergoes hydrogen bonding.
400
If two objects have the same mass, the object with the greater density will have the ________ volume.
Lesser Volume
400
If an object has a mass of 95 g and a volume of 100 cm3, will the object sink or float in a tub of water?
It will float because it has a density of .95 g/cm3
400
If there is a beaker with three liquids (densities 1.0, 1.2, and 2.4), where will a ball with a density of 1.6 come to rest?
Between the two liquids that have the densities of 1.2 and 2.4.
500
Explain how you could find the volume of an irregularly shaped object.
Find the amount of water displaced when placing it in a beaker or graduated cylinder of water.
500
Explain why 100 grams of ice has a greater volume than 100 grams of water.
Water expands when it freezes therefore taking up a larger volume even though it has the same amount of matter (mass).
500
If Test Tube #1 contains liquids A and B, with Liquid B on top, and Test Tube #2 contains liquids B and C with Liquid C on top, explain how the liquids would settle if they were all poured into a third test tube.
A would be on the bottom, B in the middle, and C on top.
500
If an object is placed in a tub of water and sinks to the bottom, what can you say about the density of the object?
It's density is greater than 1.0 g/mL.
500
If five ice cubes are placed into a beaker of water, explain why the water level rises.
Because the ice cubes become partially submerged. This means that some of the water is displaced causing the water level to rise.
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