Heterogeneous or homogeneous? worksheet - Free Printable

Problem Analysis:

The task involves determining whether the given mixtures are homogeneous or heterogeneous.

- Homogeneous Mixtures: These are mixtures where the components are uniformly distributed throughout, and the composition is the same throughout the mixture. Examples include saltwater or sugar dissolved in water.
- Heterogeneous Mixtures: These are mixtures where the components are not uniformly distributed, and different regions of the mixture can have different compositions. Examples include sand and water or oil and water.

Step-by-Step Solution:

#### 1. First Mixture: Grains + Water
- Components: Grains (solid) + Water (liquid)
- Observation: When grains are added to water, they do not dissolve but instead settle at the bottom or float on top. The mixture will have visible layers or particles.
- Conclusion: This is a heterogeneous mixture because the grains and water are not uniformly distributed.

#### 2. Second Mixture: Salt + Water
- Components: Salt (solid) + Water (liquid)
- Observation: When salt is added to water, it dissolves completely, forming a clear solution. The salt molecules are evenly distributed throughout the water.
- Conclusion: This is a homogeneous mixture because the salt is uniformly distributed in the water.

#### 3. Third Mixture: Coffee Powder + Milk
- Components: Coffee powder (solid) + Milk (liquid)
- Observation: When coffee powder is added to milk, it dissolves partially, creating a uniform mixture. The resulting mixture appears consistent without any visible separation.
- Conclusion: This is a homogeneous mixture because the coffee powder mixes uniformly with the milk.

#### 4. Fourth Mixture: Chickpeas + Water
- Components: Chickpeas (solid) + Water (liquid)
- Observation: Chickpeas are large solid particles that do not dissolve in water. They will either sink to the bottom or float on top, depending on their density.
- Conclusion: This is a heterogeneous mixture because the chickpeas and water are not uniformly distributed.

Final Answer:

Based on the analysis, the correct options are:

| MIXTURE | HOMOGENEOUS | HETEROGENEOUS |
|-----------------------------|-------------|---------------|
| Grains + Water | | ✔ |
| Salt + Water | ✔ | |
| Coffee Powder + Milk | ✔ | |
| Chickpeas + Water | | ✔ |

$$
\boxed{
\begin{array}{|c|c|c|}
\hline
\text{MIXTURE} & \text{HOMOGENEOUS} & \text{HETEROGENEOUS} \\
\hline
\text{Grains + Water} & & \checkmark \\
\hline
\text{Salt + Water} & \checkmark & \\
\hline
\text{Coffee Powder + Milk} & \checkmark & \\
\hline
\text{Chickpeas + Water} & & \checkmark \\
\hline
\end{array}
}
$$