Pure substance or mixture worksheet - Free Printable

To solve the problem, we need to determine whether each substance in the images is a pure substance or a mixture. Let's analyze each item step by step:

Definitions:

- Pure Substance: A material that has a constant composition and distinct properties. It can be an element (e.g., gold) or a compound (e.g., salt, water).
- Mixture: A combination of two or more substances that are not chemically combined and can be separated by physical means.

Analysis of Each Item:

1. Gold:
- Gold is a single element with a fixed chemical composition.
- It is a pure substance.

2. A cup of tea:
- Tea is a mixture of water, tea leaves, sugar, milk, and other ingredients.
- These components can be physically separated.
- It is a mixture.

3. Water:
- Water is a compound with a fixed chemical formula (H₂O).
- It has a constant composition and is a pure substance.

4. Salt:
- Salt is sodium chloride (NaCl), a compound with a fixed chemical formula.
- It is a pure substance.

5. Jam:
- Jam is a mixture of fruit, sugar, pectin, and other ingredients.
- These components can be physically separated.
- It is a mixture.

6. Diamond:
- Diamond is made entirely of carbon atoms arranged in a specific crystalline structure.
- It is a pure substance (an allotrope of carbon).

7. Salad:
- Salad is a mixture of various ingredients such as lettuce, tomatoes, cucumbers, nuts, and dressing.
- These components can be physically separated.
- It is a mixture.

8. Nuts:
- Nuts are a collection of different types of seeds, each with its own composition.
- They can be physically separated.
- It is a mixture.

Final Classification:

- Pure Substances: Gold, Water, Salt, Diamond
- Mixtures: A cup of tea, Jam, Salad, Nuts

Solution:

| Substance | Type |
|------------------|---------------|
| Gold | Pure Substance |
| A cup of tea | Mixture |
| Water | Pure Substance |
| Salt | Pure Substance |
| Jam | Mixture |
| Diamond | Pure Substance |
| Salad | Mixture |
| Nuts | Mixture |

Final Answer:

\boxed{
\begin{array}{|c|c|}
\hline
\text{Substance} & \text{Type} \\
\hline
\text{Gold} & \text{Pure Substance} \\
\text{A cup of tea} & \text{Mixture} \\
\text{Water} & \text{Pure Substance} \\
\text{Salt} & \text{Pure Substance} \\
\text{Jam} & \text{Mixture} \\
\text{Diamond} & \text{Pure Substance} \\
\text{Salad} & \text{Mixture} \\
\text{Nuts} & \text{Mixture} \\
\hline
\end{array}
}