Year 7 Science · Unit 1 · Lesson 02

Classification Systems

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Name
Date
Class

Learning Goals

Warm Up

Compare two

Complete the table to compare the 5-kingdom system and the 3-domain system. Fill in as many cells as you can — use your lesson notes to check.

Feature5-Kingdom System3-Domain System
Number of top-level groups
Invented / proposed by whom?
How are bacteria treated?
What happens to Kingdom Monera?
Most commonly used today in…

Your Turn

Because… chain

Fill in the missing steps. Each box leads to the next — follow the reasoning that turned Linnaeus's idea into the global naming system used today.

In 1753 Carl Linnaeus published Species Plantarum, giving each plant a unique two-word Latin name.
→
Scientists worldwide agreed to use Linnaeus's naming rules as a universal standard.
→
→
A biologist in Tokyo and a biologist in Sydney can both use Atrax robustus and know they mean exactly the same spider.
The system was extended to cover all living things, not just plants.
→

Overall outcome:

Show What You Know

1. A scientist discovers a new single-celled organism in a boiling hot spring in Yellowstone National Park, USA. Its DNA shows it is genetically very different from all known bacteria. Using the 3-domain system, which domain would this organism most likely belong to? Explain your reasoning.

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2. Before Linnaeus, a spider in Sydney might have had a long Latin description like "spider with a red stripe on its back that lives under logs near streams." Explain how the binomial system improved scientific communication, using a specific example.

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Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 7 Science · Unit 1 · Lesson 02 · Apply Worksheet