Page 123 - Knowledge Organiser Yr7 24-25

Knowledge Base: Science 7.2 Particles Year 7
1. Solids, Liquids and Gases
1.1 What are the three states of matter?
1.3 Which states of matter can flow?
Solids, liquids, gases
Liquid and gas
2. Particle Model
2.1 What is a particle?
2.2 What holds the particles in a solid together?
An incredibly tiny part of matter
Strong forces of attraction
1.2
Which state of matter has a fixed shape and volume?
Solid
2.3
How would you describe the arrangement of particles in a solid?
Particles are touching in a regular arrangement
2.4
How would you describe the movement of particles in a solid?
They vibrate about fixed positions
2.5
Why can’t solids flow?
The forces of attraction between the particles is too strong
2.6
How would you describe the arrangement of particles in a liquid?
Particles are touching in an irregular arrangement
2.7
How would you describe the movement of particles in a liquid?
Particles are not held in fixed positions and can move around each other
2.8
How would you describe the arrangement of particles in a gas?
Particles are widely spaced apart and are randomly arranged
2.9
How would you describe the movement of particles in a gas?
Particles move quickly in straight lines and in random directions
2.10
Why can liquids and gases flow?
The forces of attraction between the particles is weak
2.11
Why do gases not have a fixed volume?
Particles move quickly and collide with the walls of the container
1.4
Which state of matter flows to fit the shape of the container?
Liquid
1.5
Which state of matter expands to fill the volume of their container?
Gas
1.6
Which state of matter has a fixed volume but not a fixed shape?
Liquid
1.7 Which states of matter cannot be compressed?
1.8 Which state of matter can be compressed?
solid liquid
Solid and liquid
Gas
gas
2.12 Which state of matter has the highest density?
2.13 Which state of matter has the lowest density?
2.14 Draw a particle model for a solid, liquid and gas
Solid
Gas
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