Density and Buoyancy
What is buoyancy?
the tendency to rise or float in water or air
What is the equation for density?
Density = Mass/volume
Explain melting
The change from solid to liquid
What is a fluid?
What is floating?
Occurs when an object does not fall in air or sink in water but remains suspended in the fluid
What is buoyant force?
The upward force exerted on objects submerged in fluids
What is the density of an item that has a mass of 500g and a volume of 50 g/mL?
10g/mL
Explain vaporization
change from liquid to gas
What is a solid?
The state of matter of a substance that has a definite shape and volume
What is the Archimedes Principle?
The buoyant force acting on an object equals the weight of the fluid displaced by the object
What is density?
The amount of mass in a certain unit volume of a substance
What is the density of an item that has a mass of 70g and a volume of 103cm3?
0.68 g/cm3
Explain condensation
the change from gas to liquid
What is a liquid?
The state of matter of a substance that has a definite volume but no definite shape
What is capacity?
The greatest amount of fluid that a container can hold
What is mass?
The amount of matter in a substance
What is the volume of an item that has a mass of 2 g and a density of 19.32 g/cm3?
1 cm3
Explain freezing
Change from liquid to solid
What is a gas?
The state of matter of a substance that has neither a definite shape nor a definite volume
What is weight?
The force of a gravity exerted on an object
What is volume?
A Measurement of the amount of space occupied by the substance
What is the mass of an item that has a density of 0.0013g/mL and a volume of 550 mL?
0.715 g
Explain sublimation
Change from solid to gas
Give the 5 major points of the particle theory
1) All matter is made up of very small particles
2) All particles in a pure substance are the same
3) There is space between the particles
4) Particles are always moving
5) The particles in a substance are attracted to each other
What is the mass-to-volume ratio?
The relationship between mass and volume expressed as a quantity of the mass divided by its volume