Summary TOPIC 3 PARTICLE MODEL OF MATTER AQA GCSE PHYSICS

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Particle model of matter
Status Done


4.3.1 Changes of state and the particle
model
Density:
EQUATION: Density(kg/m³ or g/m²) = mass(kg or g)/volume(m³ or
m²) d = m v




Particle model of matter 1

, SOLIDS: (high densities)

Arrangement: Closely packed together in a fixed, regular
pattern.

Movement: Cannot move freely but vibrate about fixed
positions.

Attraction: very strong forces of attraction.

LIQUIDS: (relatively high densities)

Arrangement: randomly arranges with particles slightly
further apart than solids, take up shape of container.

Movement: particles slide past one another so have fixed
volume.

Attraction: not very strong forces

GAS: (low densities)

Arrangement: very far apart, randomly arranged and occupy any
available space.

Movement: particles move randomly at very high speed.

Attraction: negligible

How to calculate density?
REQUIRED PRACTICAL 5: use appropriate apparatus to make and
record the measurements needed to determine the densities of
regular and irregular solid objects and liquids.

Measure regular liquid:

1. measure mass by putting measuring cylinder on balance with
liquid and without liquid

2. measure how much volume used.

Measure regular solid:

1. Measure mass using balance

2. Measure volume depending on shape.



Particle model of matter 2