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Year 8 - Science

Continuous and discontinuous variation: practical

Variation (differences within species)

Unit Summary

This unit examines variation within species, both continuous and discontinuous, using measurements and graphical representations. It also emphasises objectivity, accuracy, precision, and repeatability in investigations, the use of appropriate techniques, and the effective presentation of data.

Lesson Summary

You will learn to describe and measure examples of discontinuous and continuous variation in features.

Key Notes

  • Some features have discontinuous variation (limited variations falling into particular categories).
  • Some features have continuous variation (can take any value within a range).
  • Examples of features in humans, other animals and plants that show discontinuous and continuous variation.
  • Collecting primary data on examples of discontinuous and continuous variation in features.

Vocabulary To Learn

  • discontinuous variation: Variation that is categorical (divided into particular categories).
  • continuous variation: Variation that can take any one of many values over a continuous range.
  • value: A number generated by a measurement, such as a measurement of mass or length.

Common Mistakes To Avoid

  • All types of variation can be measured in the same way.

3 Quick Questions (With Answers)

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

Some features have discontinuous variation (limited variations falling into particular categories). Some features have continuous variation (can take any value within a range).

2. Define this scientific word and use it in context. 'discontinuous variation'

Variation that is categorical (divided into particular categories). Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: All types of variation can be measured in the same way. Correction: The lesson explores the differences between discontinuous and continuous variation and how they can be measured.

More Lessons In This Unit

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