Substances Worksheets & Facts | Types, Pure vs Mixtures - Free Printable

Since the image is a worksheet titled "Elements & Compounds" and asks students to differentiate between elements and compounds by completing a table with four facts for each, I'll provide a clear, educational solution based on scientific knowledge.

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✔ Solution: Elements vs. Compounds

Below are accurate and age-appropriate facts to fill in the worksheet:

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#### ELEMENTS

| FACT 1 | Made of only one type of atom. |
|--------|-------------------------------|
| FACT 2 | Cannot be broken down into simpler substances by chemical means. |
| FACT 3 | Represented by a chemical symbol (e.g., O for oxygen, Fe for iron). |
| FACT 4 | Found on the periodic table. |

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#### COMPOUNDS

| FACT 1 | Made of two or more different types of atoms chemically bonded together. |
|--------|---------------------------------------------------------------|
| FACT 2 | Can be broken down into simpler substances (elements) by chemical reactions. |
| FACT 3 | Represented by a chemical formula (e.g., H₂O for water, CO₂ for carbon dioxide). |
| FACT 4 | Have properties different from the elements that make them up. |

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🔍 Explanation:

- Elements are pure substances made of only one kind of atom. For example, oxygen gas (O₂) is an element because it consists solely of oxygen atoms.

- Compounds are pure substances formed when two or more different elements combine chemically in a fixed ratio. For instance, water (H₂O) is a compound made of hydrogen and oxygen atoms bonded together.

The key difference:
- Elements cannot be broken down into simpler substances by chemical means.
- Compounds can be broken down into their constituent elements through chemical reactions.

This worksheet helps students understand how matter is classified at the atomic level.

Let me know if you'd like this formatted as a printable version!