Year 10 - Science
Heating curves: practical
States of matter
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit covers the particle model, states of matter, and changes between them, distinguishing physical from chemical changes. It explains the concept of purity in scientific terms, using melting point data to identify pure and impure substances, and explores the limitations of the particle model.
Lesson Summary
You will learn to collect data reliably and represent it appropriately.
Key Notes
- An investigation can measure the temperature change through continuous heating of a substance.
- Heating curve observations are best presented in a table and graphically.
- Reliable data can be collected by taking repeat measurements, identifying anomalies and calculating a mean.
- Heating curves can be used to determine the melting point of a substance.
Vocabulary To Learn
- independent variable: the single variable that is changed in an investigation
- dependent variable: the single variable that is measured or observed in an investigation
- control variable: all variables, other than the independent and dependent variables, that are kept the same in an investigation
Common Mistakes To Avoid
- Pupils can often think that when the temperature is not increasing, i.e. at a change of state, that the experiment is 'not working'.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
An investigation can measure the temperature change through continuous heating of a substance. Heating curve observations are best presented in a table and graphically.
2. Define this scientific word and use it in context. 'independent variable'
the single variable that is changed in an investigation. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils can often think that when the temperature is not increasing, i.e. at a change of state, that the experiment is 'not working'. Correction: Question students whilst circulating the class about what they would expect to see and try to get them to imagine what is happening to the particles. Use the heating curve to explain why the temperature did not increase during state changes.
More Lessons In This Unit
- Heating and cooling curves Study Guide
- Predicting states of matter Study Guide
- Predicting states of matter and limitations of the particle model Study Guide
- Pure substance Study Guide
- State changes: evaporation and sublimation Study Guide
- State changes: fundamentals Study Guide
- The particle model Study Guide
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