Introduction to Matter
introduction-to-matter
Physical Nature of Matter
physical-nature-of-matter
Particles Have Space Between Them
particles-have-space
Particles Attract Each Other
particles-attract
States of Matter
states-of-matter
Change of State: Effect of Temperature
change-of-state-temperature
Sublimation and Effect of Pressure
sublimation-pressure
Evaporation
evaporation
Summary & Practice Questions
summary-questions
Pure Substances & Mixtures
pure-substances-mixtures
Types of Mixtures
types-of-mixtures
What is a Solution?
what-is-solution
Concentration of Solutions
concentration-of-solutions
Suspensions & Colloids
suspensions-colloids
Separation Techniques - Part 1
separation-techniques-1
Separation Techniques - Part 2
separation-techniques-2
Crystallisation
crystallisation
Physical & Chemical Changes
physical-chemical-changes
Elements & Compounds
elements-compounds
A change in physical properties without change in chemical composition.
Key Point: The substance remains chemically the same
A change where new substances with different properties are formed.
Key Point: Chemical composition changes, new substances formed
| Property | Physical Change | Chemical Change |
|---|---|---|
| Composition | Same | Different |
| New substance | Not formed | Formed |
| Reversibility | Usually reversible | Usually irreversible |
| Energy | Small change | Large change |
| Type | Change |
|---|---|
| Physical | Wax melts (solid → liquid) |
| Chemical | Wax burns, produces CO₂ and H₂O |
| Process | Type |
|---|---|
| Cutting trees | Physical |
| Melting butter | Physical |
| Rusting of iron | Chemical |
| Boiling water | Physical |
| Electrolysis of water | Chemical |
| Dissolving salt | Physical |
| Burning paper | Chemical |
Interactive Visualization