states of matter and phase changes “i’m melting….”
TRANSCRIPT
States of Matter and Phase Changes
“I’m melting….”
Matter
Matter is all
around us!
Solids
Liquids
Gases
Plasma
MatterMatter can be found in one of four states of matter – sometimes called phases of matter.Can you name
them?
Solid
Gas
Liquid
Plasma
Matter - Solids
SolidsRock!
“Solid as a rock”
Solids have a definite shape
Solids have a definite volume
Molecules are tightly packed
Matter - Liquids
LiquidsSplash!
Liquids can be poured
Liquids have a definite volume
Liquids take the shape of their container
Molecules can slide past each other- they “mingle”
Matter - Gases
Gases are
Airy!Gases take the shape of their container Gases have no
definite volume
Gases can be compressed
Molecules move rapidly and are far apart
Matter - Plasma
Plasma is
stellar!
Plasma is the most common state of matter in the universe
Found in stars, Northern Lights, neon signs, and lightning
Matter - Plasma
Plasma is
stellar!
Plasma has some properties similar to gas:-No definite shape-No definite volume
But plasma is very different: -It consists of charged particles-It can conduct electricity-May form filaments under the influence of a magnetic field
States of MatterLet’s compare the three common
states of matter.Solids Liquids Gases
Definite shapeDefinite volumeMolecules do not moveVery little kinetic energy
No definite shapeDefinite volumeMolecules slide past each otherMore kinetic energy than solids
No definite shapeNo definite volumeMolecules move quickly and freelyLots of kinetic energy – much more than liquids
Matter
How do we get from a solid to a liquid?
Or from a gas to a liquid?
How does matter change from one state, or phase to another?
To Change Phase…
Add Heat
Or Remove Heat
Changing Phase
Solid Liquid Gas
Add Heat
Remove Heat
Melting Evaporation
CondensationFreezing
Molecular Motion speeds up when you add heat!
Molecular motion slows down when heat is removed
To Sum It Up…
Matter can occur in different phases, or states
Matter can change phases by adding or removing heat
Solid
Liquid
Gas
Plasma
Complete the vocabulary worksheet for homework.
It is on my desk.There will be a quiz on this
material next class, so be sure to be prepared.