Phase Changes
A solid going to a liquid
Melting
In science we use what measurement for temperature (what is the unit?)
Degrees Celcius
The lowest energy state of matter
solid
How do you calculate Density
Mass/Volume
Particles are always in constant, random _______
motion
A gas going to a liquid
condensation
If a temperature in Celcius is 10 degrees, what would be the temperature in Kelvin
283 K
highest energy state of matter
plasma
If something sinks well, it has a ______ density
high
When something gets bigger due to increasing temperature we call this...
Thermal expansion
A solid going straight to a gas, skipping the liquid phase
Sublimation
If I Have a temperature of 260 k, what is the temperature in degrees C?
-13 Degrees C
Which phase(s) have a fixed shape?
solid
Give me both acceptable units for density
g/mL and g/cm3
The particles constantly ________ with each other and the walls of the container (if applicable)
collide
In a phase change graph, it always goes from solid, to liquid, to gas. True or False
False
What is the coldest temperature possible? (hint:absolute zero)
0 Kelvin
Which phase(s) have a fixed volume?
solid and liquid
I have an object whose volume is 55 mL and has a mass of 26g, what would be the density? (include proper units!)
0.47 g/mL
Describes the avg energy of motion of the particles in a substance, correlates to temperature
Kinetic Energy
Heat is added to change an object from one state to another, during a phase change, what happens to the object's temperature
Remains the same until the phase change is complete
Temperature is the measure of...
average kinetic energy in an object
what is plasma? Does it have a fixed volume or shape?
Heated gas, has no definite volume or shape.
What is Bouyancy?
The upward force of a liquid on an object placed in it.
All matter is composed of tiny particles, name the 2 types of particles
atoms, molecules