density
Syllabus Points
5.2 - Know the relationship between density, mass and volume
5.3 - Describe experiments to determine density using direct measurements of mass and volume
5.2 - Know the relationship between density, mass and volume
5.3 - Describe experiments to determine density using direct measurements of mass and volume
Density could be seen as how 'thick' a substance is, its formula being:
![Picture](/uploads/2/7/2/0/27200031/717845938.jpg?108)
p is a substitute for density, m is mass and v is volume. The density of an object dictates if it will sink or float, depending on if its density is larger than that of water.
The unit for density is g/mL, and the density of water is 1 g/mL. If something more dense is placed in water, it would sink. If an object with the same or smaller density is placed on water, it will float.
The unit for density is g/mL, and the density of water is 1 g/mL. If something more dense is placed in water, it would sink. If an object with the same or smaller density is placed on water, it will float.
Common Experiments for Density
How to measure an irregular object Example: A stone Apparatus: String, two objects that can contain water, electronic balance 1. Measure the mass of the stone using electronic balance 2. Lower the stone into a body of water after tying it with string (do avoid disturbing water) of which you know the volume. 3. Record the new volume 4. Now that you know its volume, divide the mass by the volume to find the density |
How to make a sugar density tower - Experiment and instructions are from source
Apparatus: Clear glass test tube, pipettes, sugar, measuring spoons, food colouring and 4 small cups
1. Fill your cups with 1 cup of warm water and add food coloring to the water. You want a different color for each density. We used blue, green, yellow and red.
2. Add 2 tablespoons of sugar to the 1st cup, 4 tablespoons to the 2nd cup, 6 tablespoons to the 3rd cup and 8 tablespoons to the last cup. Colors:
* Blue - 2 tablespoons
* Yellow - 4 tablespoons
* Red - 6 tablespoons
* Green - 8 tablespoons
Label each cup with the amount of sugar added.
3. Stir the water until the sugar is dissolved.
4. Start with the cup with the most sugar. Using a pipette, dropper or back of a spoon, begin adding the first layer of sugar water.
5. Carefully drip the next dense layer onto the surface of the first. The best technique is to place the pipette right above the surface of the first layer and against the glass. Slowly drip the next color onto the first. This will take a lot of patience. Go slow.
The colors will begin to mix at first and then your original color will start to show.
6. Repeat with the next dense color and the least dense color until you have stacked all of the colors.
Source: http://www.stevespanglerscience.com/lab/experiments/colorful-sugar-density-tower
All images were sourced from Google Images: 'Density tower, Archimedes water displacement, Density Formula'
Apparatus: Clear glass test tube, pipettes, sugar, measuring spoons, food colouring and 4 small cups
1. Fill your cups with 1 cup of warm water and add food coloring to the water. You want a different color for each density. We used blue, green, yellow and red.
2. Add 2 tablespoons of sugar to the 1st cup, 4 tablespoons to the 2nd cup, 6 tablespoons to the 3rd cup and 8 tablespoons to the last cup. Colors:
* Blue - 2 tablespoons
* Yellow - 4 tablespoons
* Red - 6 tablespoons
* Green - 8 tablespoons
Label each cup with the amount of sugar added.
3. Stir the water until the sugar is dissolved.
4. Start with the cup with the most sugar. Using a pipette, dropper or back of a spoon, begin adding the first layer of sugar water.
5. Carefully drip the next dense layer onto the surface of the first. The best technique is to place the pipette right above the surface of the first layer and against the glass. Slowly drip the next color onto the first. This will take a lot of patience. Go slow.
The colors will begin to mix at first and then your original color will start to show.
6. Repeat with the next dense color and the least dense color until you have stacked all of the colors.
Source: http://www.stevespanglerscience.com/lab/experiments/colorful-sugar-density-tower
All images were sourced from Google Images: 'Density tower, Archimedes water displacement, Density Formula'