Mass
What is the definition of mass?
The amount of matter or particles in a substance
What is the definition of volume?
How much 3-D space an object takes up
What is the definition of density?
The measurement of the mass per unit volume of a substance.
What is the metric unit for mass?
g or grams
How do you show more or less mass in a particle diagram?
more or less particles
What is the name of the instrument that measures mass?
balance
What is the name of the process to find the volume of a small, irregularly shaped object with a graduated cylinder and water?
water displacement
How can you figure out the density of an object with a line graph?
calculate the slope
What is the unit for a volume of liquid when using a graduated cylinder?
mL
How do you show volume in a particle diagram?
Different-sized snapshot
What happens to the mass of ice as it changes to water?
nothing
What happens to the volume of ice as it melts to water?
volume decreases
How can the density of a substance stay the same with a greater mass?
More mass is also more volume. The mass-to-volume ratio does not change. The particle spacing is the same.
What is a unit for density?
g/mL, g/cm3
How do you show density in particle diagrams?
Spacing between the particles
In a closed system, 10 grams of water is put into the freezer to make ice. How many grams of ice will form?
10 grams
What happens to the volume of a piece of gold as it melts (changes from a solid to a liquid)?
volume increases
What is the most dense thing in the entire Universe?
Blackhole or Neutron Star
How many mL are in 155 cm³ ?
155 mL
How would particle diagrams look for 10 g of water and 100 g of water?
100g -10 times more particles and 10 times more volume. The density (spacing between particles) is the same.
How does the world keep track of what 1 kg (1000 g) of mass is?
Kibble balance: This is a highly precise instrument that uses electromagnetic force to balance the weight of an object
What is the mathematical formula for the volume of a cylinder-shaped object?
V = πr2h
What is the most dense element on the periodic chart?
Osmium 22.6 g/ml
Convert the density of 8 g/cm3 to kg/L
8 kg/L
How would particle diagrams look for 10 g of copper (8.96 g/ml) and 10 g of water (1.00 g/ml)
-Same mass (number of particles)
-more volume for water (size of snapshot)
- closer spacing of particles for copper (more dense)