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Year 7 - Science

Solubility: analysis

Solutions

Unit Summary

This unit explores the concepts of pure substances, mixtures, and diffusion in liquids and gases. It emphasises accuracy, precision, and the use of appropriate techniques during investigations. The focus is on making predictions and recording reliable observations.

Lesson Summary

You will learn to draw an appropriate representation of solubility data and use it to write a conclusion.

Key Notes

  • Scientists transfer data to graphs in order to find any trends in the collected data.
  • The type of data collected affects the type of graph used to present it.
  • A line of best fit can help to identify and describe relationships between variables.
  • Conclusions refer to both the independent and dependent variables when describing the data collected.

Vocabulary To Learn

  • discrete data: Data that can only take distinct values or is a category, e.g. shoe size, number of people.
  • continuous data: Data that can be a value within a range, e.g. temperature, mass, height, etc.
  • bar chart: Chart showing solid columns to present data; usually used when one variable is discrete.
  • scatter graph: A graph in which two continuous variables are plotted. It is used to find if a relationship exists between the variables.
  • line of best fit: A line of best fit is drawn through a set of plotted points on a scatter graph, to best show the trend in the data displayed.

Common Mistakes To Avoid

  • Pupils commonly confuse discrete & continuous data. They also think lines of best fit are straight.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

Scientists transfer data to graphs in order to find any trends in the collected data. The type of data collected affects the type of graph used to present it.

2. Define this scientific word and use it in context. 'discrete data'

Data that can only take distinct values or is a category, e.g. shoe size, number of people. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Pupils commonly confuse discrete & continuous data. They also think lines of best fit are straight. Correction: Link *how* the data is collected to the type of data it is. Stress that best fit lines are just that - a best fit - they aren't exact!

More Lessons In This Unit

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