Solids, Liquids and Gases
TxBk pg 190-192
What is our world made of?
States of Matter:
• Every substance in the world around us exists as a ______
______
States of matter
• Solid (____)
• Liquid (____)
• Gas (_____)
***Matter is anything which
______***
Properties of Solids:
Properties of Liquids:
Properties of Gases:
Matter: Particle Theory
What does the particle theory tell us?
• Explains the ______of solids, liquids and gases
• Imagine solids, liquids and gases to be made up of ______
• The particles are ______
Particle Theory: Solids
• Particles arranged in ______way
• Strong ______holding them together
• Can’t move ______
• Can ______about position
Particle Theory: Liquids
• Particles in ______& can ______each other
• ______holding them together- ______than in solid
• No ______of particles
• Has ______of its own
• Always takes up the ______
Particle Theory: Gases
• Particles much ______from each other
than in a solid or liquid
• ______between gas particles
• Complete freedom of ______
into ______available space
• Move about ______with
each other and the walls of the container
Change of State:
Change of State: Melting Point
• Solid is ______– heat energy causes ______
• Heating continues – particles move ______
• ______from fixed position – begin to ______each other
• The temperature at which the solid melts – ______
Change of State Definition: Melting Point
The melting point is ______
______
Change of State: Boiling Point
• Liquid heated – particles get ______& move ______
______
• Eventually ______have enough energy to overcome ______
• Particles break away from ______and form ______
• Liquid – ______
• Particles escaping quickly causes ______forming inside the liquid (water vapour in case of water) – boiling point
Change of State Definition: Boiling Point
The boiling point is ______
______
Change of State: Evaporation
• What happens if there are puddles on the road on a sunny day?
• Sun gives some particles ______
• Particles have enough energy to overcome ______holding them together
• Break away from ______& go ______
• Some liquid has ______ to form a ______
• Evaporation is ______
Evaporation VS Boiling Point
• Liquid doesn’t have to be ______to its ______for evaporation to occur – evaporation from ______is always taking place
Sublimation
• Some substances when heated change ______
______
• Iodine and solid carbon dioxide (dry ice)
• Reverse: gas to solid - ______
Change of State – condensation
• When gas ______
• Particles ______, become ______to each other
• ______formed eventually
• Steam (______) cooled when it hits the ______mirror
• Particles slow down, become ______
• Liquid formed eventually