Classifying Matter & Separating Mixtures — Drills · Grade 11 Science
Chapter: Investigating MatterWhat these drills covers
By the end of Classifying Matter & Separating Mixtures you should be able to:
- I can distinguish elements, compounds, and mixtures using composition.
- I can plan separations based on physical-property differences.
2 questions, written answer, each with a worked explanation.
Vocabulary used: pure substance, mixture, filtrate.
Problem 1
Why does a coffee filter not remove dissolved sugar?
Answer and explanation
Dissolved molecules pass through its pores with the liquid; filtration removes larger particles.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.
Problem 2
Explain why boiling and electrolysis of water are different kinds of change.
Answer and explanation
Boiling changes phase without changing H₂O; electrolysis is a chemical decomposition into hydrogen and oxygen.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.