Solids, liquids, and gases | 5th grade Science Worksheet ... - Free Printable

Problem Description:

The task involves classifying various substances as solids, liquids, or gases based on their physical states. The substances listed are:

- Cotton
- Plastic
- Water
- Air
- Water vapor
- Milk
- Blood
- Oxygen

Solution Approach:

To solve this problem, we need to understand the definitions of solids, liquids, and gases:

1. Solids: Substances with a definite shape and volume. They resist external forces that would change their shape.
2. Liquids: Substances with a definite volume but not a definite shape. They take the shape of their container.
3. Gases: Substances with neither a definite shape nor a definite volume. They expand to fill the volume of their container.

Now, let's classify each substance:

---

#### 1. Cotton
- Cotton is a solid material. It has a definite shape and volume and does not flow like a liquid or gas.
- Classification: Solid

#### 2. Plastic
- Plastic is a solid material. It has a definite shape and volume, even though it can be molded into different shapes under heat and pressure.
- Classification: Solid

#### 3. Water
- Water is a liquid. It has a definite volume but takes the shape of its container.
- Classification: Liquid

#### 4. Air
- Air is a gas. It has neither a definite shape nor a definite volume and expands to fill any container.
- Classification: Gas

#### 5. Water vapor
- Water vapor is the gaseous state of water. It has no definite shape or volume and expands to fill any container.
- Classification: Gas

#### 6. Milk
- Milk is a liquid. It has a definite volume but takes the shape of its container.
- Classification: Liquid

#### 7. Blood
- Blood is a liquid. It has a definite volume but flows and takes the shape of its container (e.g., veins, arteries).
- Classification: Liquid

#### 8. Oxygen
- Oxygen is a gas. It has no definite shape or volume and expands to fill any container.
- Classification: Gas

---

Final Classification:

- Solids: Cotton, Plastic
- Liquids: Water, Milk, Blood
- Gases: Air, Water vapor, Oxygen

Answer:

\[
\boxed{
\text{Solids: Cotton, Plastic} \\
\text{Liquids: Water, Milk, Blood} \\
\text{Gases: Air, Water vapor, Oxygen}
}
\]