Biodiversity & History of Life
Exploring the diversity of life and how it evolved over time
Module Overview
In this Grade 10 Life Sciences module, you learn how scientists classify living organisms and how evidence from fossils, rock layers, and continental movement helps explain the history of life on Earth. Keep the CAPS focus in mind: biodiversity, classification, change over time, and the major events that shaped life as we know it.
Understand how organisms are classified and how all life shares common ancestry.
Study Topics
Biodiversity
Variety of species, genetic diversity, and ecosystem stability
Five-Kingdom Classification System
How scientists organize all living organisms into five kingdoms
Characteristics of Each Kingdom
Features of Monera, Protista, Fungi, Plantae, and Animalia
Binomial Nomenclature
The universal two-part scientific naming system
Fossils
How fossils form and what they reveal about past life
Geological Timescale
Earth's 4.6 billion-year history divided into eras
Evidence for Change Over Time
Fossils, comparative anatomy, DNA, and biogeography
Continental Drift
How moving continents affected species distribution
Mass Extinctions
The five major extinction events and how life recovers
Study Tip
After each topic, practise saying the key idea aloud in your own words before you try the quiz.
Time Estimate
Each topic takes about 20-30 minutes to complete with quizzes and games.
Key Learning Points
- Biodiversity encompasses species diversity, genetic diversity, and ecosystem diversity
- The five-kingdom classification system organizes all life based on fundamental characteristics
- Binomial nomenclature provides a universal naming system for organisms
- Fossils, DNA, anatomy, and biogeography all provide evidence for evolution
- The geological timescale shows Earth's history spans billions of years
- Continental drift has shaped the distribution of life and promoted speciation
- Mass extinctions have periodically reduced biodiversity but life has recovered and diversified
