Lesson Notes By Weeks and Term v4 - SHS 3

Lesson Video

This page supports the lesson note with a companion video and a short classroom-ready summary.

For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.

Performance objectives

• Explain the formation of the sun, planets, and stars.
• Identify the stages of stellar evolution.
• Discuss the role of gravity in forming celestial bodies.
• Challenge stereotypes about who can study space science.

Lesson summary

Welcome, students. Every morning, we see the sun rise, a giant ball of fire that gives us light and warmth, allowing our crops like cocoa and yam to grow. At night, we see countless stars, and sometimes planets like Venus (the "evening star"). Have you ever wondered where these celestial bodies came from? How was our Sun born? How was the Earth, our home, formed? This lesson moves beyond just looking at the sky and delves into the fundamental physics that explains the creation of our entire solar system and the universe beyond. Understanding this helps us appreciate our place in the cosmos and the scientific principles, like gravity and energy, that govern everything.

Lesson notes

This section breaks down the entire process of how stars and planets are formed. We will follow a logical story, from a giant cloud of gas to a complete solar system. Part 1: The Birth of a Star (e.g., Our Sun)

The formation of a star is a process that takes millions of years. It can be broken down into four main stages.

Stage 1: The Nebula - A Cosmic Cloud What it is: A nebula is a gigantic cloud of gas and dust floating in space. Composition: These clouds are mostly made of hydrogen (about 75%) and helium (about 24%), the lightest and most abundant elements in the universe. The remaining 1% is made of tiny dust particles (silicates, carbon, iron). State: The nebula is cold and has very low density. The particles are far apart.

(Analogy): Imagine a huge, thin cloud of *harmattan* dust mixed with cooking gas, but stretching for trillions of kilometres in space.

Evaluation guide

• Explain the formation of the sun, planets and stars.
• Enquiry learning: Using the internet/reference books let learners research to come out with
• information on the formation of the sun, planets and stars.
• Challenge stereotypes and misconceptions about gender and disabilities in the study of space