🔬 Part 1: Understanding Matter

1. Define the following terms:

Pure substance:

Mixture:

2. What is the main difference between an element and a compound?

⚛️ Part 2: Classification Practice

3. Classify each of the following as an Element (E), Compound (C), or Mixture (M). Write the letter in the box.

Water (H₂O)

Oxygen gas (O₂)

Salt water

Carbon dioxide (CO₂)

Iron (Fe)

Soil

Sugar (C₆H₁₂O₆)

Air

Gold (Au)

Fruit salad

4. Circle the correct answer for each question:

Which of these is a pure substance?

Muddy water

Pure water (H₂O)

Orange juice

Concrete

Which symbol represents an element?

H₂O

CO₂

Na

NaCl

🧪 Part 3: Symbols and Formulas

5. Match the chemical symbols with their element names:

1. O

2. Fe

3. C

4. Au

5. H

A. Carbon

B. Gold

C. Hydrogen

D. Iron

E. Oxygen

6. Fill in the blanks with the correct terms:

The chemical formula H₂O represents a _____________ made up of _____ hydrogen atoms and _____ oxygen atom.

A mixture can be separated by _____________ methods, while a compound can only be separated by _____________ methods.

The symbol Fe represents the element _____________, which is a _____________ substance.

🎨 Part 4: Visual Representation

7. Draw a simple particle diagram to represent each type of matter. Use circles to represent atoms and different colours/patterns for different elements.

Element (e.g., oxygen gas O₂):

Compound (e.g., water H₂O):

Mixture (e.g., salt water):

🤔 Part 5: Critical Thinking

8. Explain why air is classified as a mixture rather than a compound, even though it contains multiple elements.

9. A student finds a sample that contains only carbon atoms. Is this an element, compound, or mixture? Justify your answer.

10. List three methods that could be used to separate mixtures and give an example of when each might be used.

Method 1: ________________________

Example: ________________________

Method 2: ________________________

Example: ________________________

Method 3: ________________________

Example: ________________________

Classifying Matter Worksheet

Classifying Matter Worksheet

🔬 Part 1: Understanding Matter

⚛️ Part 2: Classification Practice

🧪 Part 3: Symbols and Formulas

🎨 Part 4: Visual Representation

🤔 Part 5: Critical Thinking

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