Mass Weight And Density Flashcards
What is the triangle formation for weight, mass and gravity?
. W
——
M x G
(Weight = mass x gravity)
What does the mass of an object tell us?
The amount of matter the object contains
What does the volume of an object tell us?
How much space the object takes up.
What does density tell us about an object?
The mass of a certain amount of it (e.g. 1cm3)
What is the triangle for mass, volume and density?
. M
———
D x V
How do you measure mass?
Place it on a digital balance
How do you measure volume?
LxBxH
Or in the case of an irregular object, lower it into a measure if cylinder and measure the amount of water is displaced.
Describe the experiment that finds the density of a regular object.
- Find the mass of the object using a digital balance
- Use a ruler to measure the length, height and width of a cuboid
- Calculate the volume using V=LxBxH (cm3)
- Calculate the density using D= mass/volume
- Repeat for other materials.
Describe the experiment that finds the density of a liquid.
- Find the mass of an empty dry cylinder
- Add a singular, measurable amount of liquid
- Find the mass of a cylinder + liquid
- Measure the volume; eye level with miniscus
- Calculate the mass of the liquid by subtracting the cylinders dry mass
- Calculate the density, D= Liquid mass/Liquid volume
(1ml = 1 cm3)
Describe the experiment that finds the volume of a irregular object.
- Fill a 50ml measuring cylinder with 30ml of water
- Place it on a digital balance and record the mass
- Record the exact volume of the water
- Add a marble and record the new mass and volume.
- Continue to add marbles until 7 results are obtained.
- Calculate the volume and mass of the marbles alone.
How do you plot a mass-volume graph?
Volume x axis
Mass y axis
How many g/cm3 exist in 1 kg/m3?
1000.
What are the units for density?
g/cm3
What are the units for volume?
cm3
What are the units for mass?
kg
