DENSITY
-Density: Comparison of how much matter there is in a certain space.
-The formula for density is: Mass ÷ Volume
-The units for Density are Grams (g)
-Mass: Amount of matter in an object.
-Volume: How much space something takes up.
-An objects density determines if it will sink or float in water as well.
-Water has a density of 1g/ml. Therefore anything with a density greater than 1 will sink. Anything with a density less than 1 will float.
-When you have multiple substances in a container, their density determines how they will all "stack up". We can see this take place in things like salad dressing. When you get a new bottle you always shake it before you use it! That's because all the different things have separated out, due to their different densities.
-One very useful tool when dealing with density is the density triangle. It shows you how to set up an equation to find an objects density, mass, or volume.
-Density: Comparison of how much matter there is in a certain space.
-The formula for density is: Mass ÷ Volume
-The units for Density are Grams (g)
-Mass: Amount of matter in an object.
-Volume: How much space something takes up.
-An objects density determines if it will sink or float in water as well.
-Water has a density of 1g/ml. Therefore anything with a density greater than 1 will sink. Anything with a density less than 1 will float.
-When you have multiple substances in a container, their density determines how they will all "stack up". We can see this take place in things like salad dressing. When you get a new bottle you always shake it before you use it! That's because all the different things have separated out, due to their different densities.
-One very useful tool when dealing with density is the density triangle. It shows you how to set up an equation to find an objects density, mass, or volume.
-Mass is at the top of the triangle. Density and Volume are at the bottom.
-You get the mass by multiplying Density X Volume.
-You get the Density by dividing Mass ÷ Volume.
-You get the Volume by dividing Mass ÷ Density.
-Every object in the triangle may be used to find the others.
-As long as you know two out of the three pieces of the triangle, you will be able to find the missing one.
-The line under the m on the triangle means divide. The line between the D and V means multiply.
QUESTIONS
1. What is the formula for density? (see student solutions)
2. What is the density of an object if its mass is 4g and its volume is 2cm^2? (see student solutions)
3. Draw the density triangle.
4. What is the volume of an object if its density is 30g/cm^2 and its mass is 15g?
-You get the mass by multiplying Density X Volume.
-You get the Density by dividing Mass ÷ Volume.
-You get the Volume by dividing Mass ÷ Density.
-Every object in the triangle may be used to find the others.
-As long as you know two out of the three pieces of the triangle, you will be able to find the missing one.
-The line under the m on the triangle means divide. The line between the D and V means multiply.
QUESTIONS
1. What is the formula for density? (see student solutions)
2. What is the density of an object if its mass is 4g and its volume is 2cm^2? (see student solutions)
3. Draw the density triangle.
4. What is the volume of an object if its density is 30g/cm^2 and its mass is 15g?
The Light Bulb Application here is about objects density's. When you have multiple substances in a container, their density determines how they will all "stack up". We can see this take place in things like salad dressing. When you get a new bottle you always shake it before you use it! That's because all the different things have separated out, due to their different densities. Look at a bottle of Italian dressing to see this.