Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What are the processes of a solid turning into a liquid and a liquid turning into a gas called? What are the processes called changing from a gas to a liquid?
   • The process of a solid turning into a liquid is called melting. The process of a liquid turning into a solid is called freezing. The process of a liquid turning into a gas is called evaporation. The process of a gas turning into a liquid is called condensation.
2. What is the process of a solid turning into a gas called?
   • The process of a solid turning into a gas is called sublimation.
3. Do uncharged particles attract or repel each other?
   • Particles always attract each other.
4. How do the forces of attraction and collision determine the state of matter?
   • Solids exist when the attraction between Particles is greater than the Forces involved in collisions. Gases exist when the attraction between Particles is less than the Forces involved in collisions.
5. Why are liquids able to pour and take the shape of their containers?
   • Liquids can pour and take the shape of their container because Particles are able to change places with each other. This is what causes the lack of a pattern.
6. What effect does energy have on the forces of attraction during melting?
   • Liquids exists when some Particles temporarily get enough Energy to over come the Forces of attraction with its neighbour and so change places with each other.