# Biological Classification: Intro to Taxonomy & Kingdoms
> Learn the basics of biological classification, the 5 kingdoms of life, and Carl Linnaeus's binomial nomenclature system in this biology lesson.

Tags: biology, taxonomy, classification, science-education, kingdoms-of-life, carl-linnaeus, binomial-nomenclature
## How Do We Make Sense of All Life on Earth?
- Introduction to biological classification for Year 8 Biology.

## Why Classify?
- Over 8 million species exist on Earth.
- Systems are needed to Identify (name organisms), Relate (find evolutionary links), and Organise (group species).

## The Big Groups: Kingdoms
- **Animals**: Heterotrophs that move; no cell wall.
- **Plants**: Autotrophs with cell walls.
- **Fungi**: Decomposers that absorb nutrients.
- **Protists**: Mostly single-celled organisms.
- **Bacteria**: Microscopic organisms without a nucleus.

## Evidence-Based Classification
- Examples: Sharks and Salmon are fish (gills, cold-blooded, eggs, scales).
- Dolphins are mammals (lungs, warm-blooded, live young, milk), similar to humans.
- Scientists use evidence, not just appearance, to classify life.

## Carl Linnaeus & Taxonomy
- Carl Linnaeus (1707–1778) is the Father of Taxonomy.
- **Binomial Nomenclature**: Every species has two Latin names (Genus + species).
- Examples: Lion (*Panthera leo*), House Cat (*Panthera domesticus*), Human (*Homo sapiens*).

## Learning Objectives
- Understand the purpose of classification.
- Identify major kingdoms.
- Learn why scientific evidence is used over physical appearance.
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