Particle Model of Matter, Change of State and Chemical Reactions
Particle Model of Matter, Change of State and Chemical Reactions is one of 9 topics in the Grade 8 Natural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What does the particle model of matter explain?
That all matter (solids, liquids and gases) is made up of tiny particles
That only solids are made up of particles
That matter is made up of one giant particle
That liquids contain no particles at all
Answer: That all matter (solids, liquids and gases) is made up of tiny particles — The particle model of matter explains that all matter -- solids, liquids and gases -- is made up of tiny particles.
Easy
2. In which state of matter are particles closely packed in a regular arrangement, vibrating but not moving around freely?
Solid
Liquid
Gas
None of these
Answer: Solid — In a solid, particles are closely packed in a regular arrangement, vibrating against each other but not moving around freely.
Medium
3. What is contained in the spaces between particles, according to the particle model?
Answer: nothing — The spaces between particles contain nothing at all -- not air, not any other substance.
