Chap. 1
States of Matter: Solids, Liquids, and Gases
Matter is anything that takes up space and has weight. It exists mainly in three states: solid, liquid, and gas. Each state has unique properties.
Chap. 2
Solids
1. Definition
A solid is a state of matter with a fixed shape and volume.
2. Properties
- Shape: Solids keep their shape and do not change unless broken or cut.
- Volume: Solids have a definite volume that does not change.
- Particle arrangement: Particles are tightly packed and arranged in a fixed pattern.
- Particle movement: Particles vibrate but do not move from their places.
3. Examples
- Ice
- Wood
- Metal
- Rock
Chap. 3
Liquids
1. Definition
A liquid is a state of matter that has a definite volume but no fixed shape.
2. Properties
- Shape: Liquids take the shape of their container.
- Volume: Liquids have a fixed volume that does not change easily.
- Particle arrangement: Particles are close but not in a fixed pattern.
- Particle movement: Particles move around each other freely.
3. Examples
- Water
- Milk
- Juice
- Oil
Chap. 4
Gases
1. Definition
A gas is a state of matter with no fixed shape or volume.
2. Properties
- Shape: Gases take the shape of their container.
- Volume: Gases expand to fill the entire volume of their container.
- Particle arrangement: Particles are far apart and move freely.
- Particle movement: Particles move quickly in all directions.
3. Examples
- Air
- Oxygen
- Helium
- Steam
Chap. 5
Comparing Solids, Liquids, and Gases
| Property | Solid | Liquid | Gas |
|---|---|---|---|
| Shape | Fixed | Takes container shape | Takes container shape |
| Volume | Fixed | Fixed | Changes (fills container) |
| Particle arrangement | Tightly packed, fixed | Close but random | Far apart, random |
| Particle movement | Vibrate in place | Move around each other | Move freely and fast |
Chap. 6
Changes of State
Matter can change from one state to another when heated or cooled.
| Change | From → To | Description |
|---|---|---|
| Melting | Solid → Liquid | Solid heats and becomes liquid |
| Freezing | Liquid → Solid | Liquid cools and becomes solid |
| Evaporation | Liquid → Gas | Liquid heats and becomes gas |
| Condensation | Gas → Liquid | Gas cools and becomes liquid |
| Sublimation | Solid → Gas | Solid changes directly to gas |
| Deposition | Gas → Solid | Gas changes directly to solid |
Chap. 7
Summary
Matter exists in three states: solids have fixed shape and volume, liquids have fixed volume but change shape, and gases have no fixed shape or volume.
