Density and Buoyancy
What is buoyancy?
It is the tendency for the object to rise or float in a fluid.
(The upward force exerted on an object in a fluid. )
What is the equation for density?
Density = Mass/volume
Explain melting
The change from solid to liquid
What is a fluid?
Any substance that flows
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 evaporization
the 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 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 mass?
The amount of matter or particles within 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?
0.1 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 volume?
A measurement of the amount of space occupied by a 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) Adding heat to particles will make them move faster