Phys PCT 2 Revision P3

Question 1

Solid

Answer 1

Density : High

Fluidity : Cannot flow

Volume : Fixed, cannot easily be compressed

Shape : Fixed shape

Question 2

Liquid

Answer 2

Density : High

Fluidity : Flows

Volume : Fixed, cannot easily be compressed

Shape : Takes the shape of the bottom of the container it is in

Question 3

Gas

Answer 3

Density : Low

Fluidity : Flows very quickly

Volume : Varies, can be compressed easily

Shape : Spreads rapidly and fills the container it is in

Question 4

Molecular model Solid

Answer 4

A solid as being made from a regular pattern of particles, closely packed together and held in place by strong, attractive forces. The material stays in shape because the particles are not free to move – each particle holds the nearby particles in position, because of the strong forces between them.

Solid is hard to compress as they are packed closely. When we try to squash the material, the forces holding the particles become more repulse, keeping the particles the same range apart

• A solid as being made from regular pattern of particles, closely packed together and held in place by strong attractive force
• They stay in stay in shape because the part particles are not free to move

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Question 5

Molecular model ( Liquid )

Answer 5

• In liquids, the molecules are very close together
• Water does not compress
• The bonds between the particles in a liquid are weaker than in solids
• This mean they can move and the shape of liquid can change