| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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Traditionally living things have been classified into groups depending on their structure and characteristics in a system developed by Carl Linnaeus |
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How have organisms been classified traditionally and who by? Exhibition of organisms to classify, use post-it notes to explain groupings – observe and discuss choices made by other groups. |
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Linnaeus classified living things into kingdom, phylum, class, order, family, genus and species. |
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What did Linnaeus classify all living things into? Compare the classification of related and unrelated organisms using the Linnaeus system. |
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Organisms are named by the binomial system of genus and species. |
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How are organisms named scientifically? Look at the variety of names given to the same plant and discuss why the binomial system is more useful. |
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Students should be able to use information given to show understanding of the Linnaean system. |
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Students should be able to describe the impact of developments in biology on classification systems. |
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As evidence of internal structures became more developed due to improvements in microscopes, and the understanding of biochemical processes progressed, new models of classification were proposed. (WS) Understand how scientific methods and theories develop over time. |
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What development lead to new models of classification and how? |
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Due to evidence available from chemical analysis there is now a ?three- domain system? developed by Carl Woese. In this system organisms are divided into:
? archaea (primitive bacteria usually living in extreme environments)
? bacteria (true bacteria)
? eukaryota (which includes protists, fungi, plants and animals).
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Who developed the 'three-domain system' and how are organisms in this system classified? Watch BBC video clip about chemical analysis and its use in classifying organisms (see resources).
http://www.bbc.co.uk/education/clips/zhb3cdm |
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Evolutionary trees are a method used by scientists to show how they believe organisms are related. They use current classification data for living organisms and fossil data for extinct organisms. |
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Why are evolutionary trees used by scientists and what data do they use for it? |
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Students should be able to interpret evolutionary trees (WS) |
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