Table classifying materials into pure substances and mixtures, with details on elements and compounds.

It looks like you've uploaded an image of a chemistry worksheet titled "Classifying Matter", which contains a table with various substances and asks to classify each as either pure substance or mixture, and then further classify mixtures as homogeneous or heterogeneous.

Since I can't view images directly, I’ll help you solve this task based on the typical content of such worksheets. Below is a general guide to solving this type of problem, followed by a likely solution based on common examples in such tables.

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🔍 Understanding the Classifications

1. Pure Substance:
- A substance that has a fixed composition and distinct chemical properties.
- Can be an element (e.g., oxygen) or a compound (e.g., water).
- Examples: H₂O, Fe, NaCl.

2. Mixture:
- A combination of two or more substances that are not chemically bonded.
- Can be homogeneous (uniform throughout) or heterogeneous (not uniform, visible differences).

- Homogeneous Mixture: Uniform composition (e.g., saltwater).
- Heterogeneous Mixture: Non-uniform, components can be seen (e.g., sand and water).

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✔ Common Examples & Classification

Here’s how typical entries in such a table might be classified:

| Substance | Classification |
|----------|----------------|
| Saltwater | Mixture – Homogeneous |
| Air | Mixture – Homogeneous |
| Sand and water | Mixture – Heterogeneous |
| Pure water (H₂O) | Pure Substance |
| Oxygen gas (O₂) | Pure Substance |
| Carbon dioxide (CO₂) | Pure Substance |
| Milk | Mixture – Heterogeneous (or colloidal, but often labeled heterogeneous) |
| Brass (Cu + Zn) | Mixture – Homogeneous (alloy) |
| Salad dressing | Mixture – Heterogeneous |
| Sugar dissolved in water | Mixture – Homogeneous |
| Iron (Fe) | Pure Substance |
| Salt (NaCl) | Pure Substance |
| Soil | Mixture – Heterogeneous |
| Bronze | Mixture – Homogeneous |
| Blood | Mixture – Heterogeneous |
| Vinegar | Mixture – Homogeneous |
| Lemonade (with pulp) | Mixture – Heterogeneous |
| Lemonade (without pulp) | Mixture – Homogeneous |

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🧠 How to Solve It Step-by-Step:

1. Identify if it's a pure substance:
- Is it one element or compound?
- If yes → Pure Substance
- If no → Mixture

2. If it's a mixture:
- Look at whether the components are evenly distributed.
- If uniform → Homogeneous
- If not → Heterogeneous

3. Use real-world knowledge:
- Saltwater = homogeneous
- Sand in water = heterogeneous
- Air = homogeneous (gases mix uniformly)

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💡 Example Walkthrough:

Let’s say the table includes:

- Saltwater → Mixture – Homogeneous
*(Salt dissolved in water, uniform)*

- Sand and water → Mixture – Heterogeneous
*(You can see sand particles settling)*

- Oxygen gas → Pure Substance
*(Element, only O₂ molecules)*

- Air → Mixture – Homogeneous
*(Gases mixed uniformly)*

- Iron (Fe) → Pure Substance
*(Element)*

- Carbonated water → Mixture – Homogeneous
*(CO₂ dissolved in water, uniform)*

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✔ Final Answer Format (for your table):

Fill in the table like this:

| Substance | Pure Substance / Mixture | Homogeneous / Heterogeneous |
|-----------------------|--------------------------|------------------------------|
| Saltwater | Mixture | Homogeneous |
| Sand and water | Mixture | Heterogeneous |
| Oxygen gas | Pure Substance | — |
| Iron | Pure Substance | — |
| Air | Mixture | Homogeneous |
| Milk | Mixture | Heterogeneous |
| Sugar water | Mixture | Homogeneous |
| Soil | Mixture | Heterogeneous |

> Note: For pure substances, the "homogeneous/heterogeneous" column is usually left blank or marked with “—”.

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If you can provide the exact list of substances from your image (by typing them out), I can give you the precise classifications for your worksheet.