Matter is anything that has mass and occupies space. It can exist in different states, such as solid, liquid, or gas, and can take on various forms. Here are 10 examples of matter, illustrating different types of substances found in everyday life:
### 1. **Water (H₂O)**
- **State**: Liquid (though it can also be a solid, like ice, or a gas, like steam)
- **Description**: Water is a clear, colorless liquid that is essential for life. It covers about 71% of Earth's surface and is used in various processes, such as drinking, cooking, and cleaning.
### 2. **Air (Nitrogen, Oxygen, Carbon Dioxide, etc.)**
- **State**: Gas
- **Description**: Air is a mixture of gases, primarily nitrogen (78%) and oxygen (21%), with small amounts of carbon dioxide, argon, and other gases. It is essential for breathing and supporting life on Earth.
### 3. **Iron (Fe)**
- **State**: Solid
- **Description**: Iron is a metallic element that is commonly used in construction, tools, and machinery. It is one of the most abundant elements on Earth and is known for its strength and durability.
### 4. **Table Salt (Sodium Chloride, NaCl)**
- **State**: Solid
- **Description**: Table salt is a white, crystalline solid made of sodium and chlorine. It is commonly used in cooking to enhance the flavor of food and also plays a role in various industrial applications.
### 5. **Wood (Cellulose)**
- **State**: Solid
- **Description**: Wood is the hard, fibrous material that makes up the trunks and branches of trees. It is widely used as a building material, for furniture, and as fuel for heating.
### 6. **Carbon Dioxide (CO₂)**
- **State**: Gas
- **Description**: Carbon dioxide is a colorless, odorless gas that is produced by respiration and combustion. It is also used in carbonated beverages and is an essential component in the process of photosynthesis in plants.
### 7. **Gold (Au)**
- **State**: Solid
- **Description**: Gold is a soft, yellow metal that is highly valued for its rarity and beauty. It is often used in jewelry, coins, and as a store of value.
### 8. **Plastic (Polyethylene, PVC, etc.)**
- **State**: Solid (can be molded into different shapes)
- **Description**: Plastic is a synthetic material made from polymers. It is used in a wide range of products, from packaging to household items, because it is durable, lightweight, and versatile.
### 9. **Oxygen (O₂)**
- **State**: Gas
- **Description**: Oxygen is a vital gas in Earth's atmosphere that is essential for life. Humans and animals inhale oxygen for respiration, while plants release oxygen through photosynthesis.
### 10. **Ice (Solid Water)**
- **State**: Solid
- **Description**: Ice is the solid form of water, created when water freezes at temperatures below 0°C (32°F). It is commonly used in drinks to keep them cold and in various cooling systems.
Each of these examples demonstrates how matter exists in different forms and plays crucial roles in daily life, from sustaining life to providing materials for building and manufacturing.