Classifying Matter Using Particle Models 2 | Worksheet - Free Printable

1. Circle the models that represent pure substances.
- A
- C
- D
- E

2. Circle the models that represent mixtures.
- B
- F

3. Compare the pure substance models. Identify one similarity and one difference among them.
- Similarity: All pure substance models (A, C, D, E) contain only one type of particle throughout the sample.
- Difference: Models A and C show molecules (particles made of two or more atoms bonded together), while models D and E show individual atoms (single particles).

4. Can a mixture be made of both compounds and elements? Support your answer with details from the models.
- Yes, a mixture can be made of both compounds and elements. Model B shows a mixture containing two different types of particles: some are single atoms (elements, like the green circles) and others are molecules made of two different atoms (compounds, like the yellow-green pairs). This demonstrates that a mixture can contain both elements and compounds simultaneously.