Edexcel IGCSE Physics 5 10p Particle Arrangement and Motion Questions
Compare packing, regularity and particle motion across the three states using diagrams and exam descriptions.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- Describe or draw particle arrangements in the three states: solids are regular and close-packed, liquids are close-packed but irregular, and gases are widely spaced and irregular.
- Compare particle motion across the states: particles vibrate about fixed positions in solids, slide past one another in liquids, and move freely, quickly and randomly in gases.
Edexcel IGCSE Physics 5 10p Particle Arrangement and Motion Questions question 1
[Maximum number: 2]
This question is about sound waves.
The speed of sound in liquids is greater than the speed of sound in gases.
Describe the arrangement of particles in liquids and in gases.
You may use diagrams to help your answer.
- particles arranged randomly
- particles further apart in gas than in liquid
Accept:
- either mark if clear from diagrams
- irregularly for randomly
- random arrangement for liquid, gas, or both
- reverse argument
Ignore:
- diagram for the distance mark if gaps in liquid are bigger than one particle
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