Strand: CYCLES ................................ ................................ ................................ ................................ ................................ .......................... 52
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Science
Class: Basic 3
Term: 1st Term
Week: 8
Strand code: 1
Theme: CYCLES ................................ ................................ ................................ ................................ ................................ .......................... 52
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.
Hello Class Three! Today, we're starting a fascinating journey into the world of cycles! What are cycles? Well, they are things that happen again and again in a regular way, like the seasons of the year or the way we use water in our homes. Understanding cycles helps us appreciate how things work in nature and how we can better manage our resources. This will especially help us understand how we depend on the environment here in Ghana.
What is a Cycle?
A cycle is a series of events that happen repeatedly in the same order. Think of it like a wheel turning around and around – it always comes back to where it started. Many things in our world happen in cycles, from the rising and setting of the sun to the growth of plants.
Examples of Cycles: The Day and Night Cycle: This is one of the most basic cycles. The Earth spins around, and as it does, different parts of the Earth face the sun, giving us day. When our part of the Earth turns away from the sun, we have night. This happens every day! The Water Cycle: Water is constantly moving around the Earth in a cycle. Let's see how it works: Evaporation: The sun heats up water in rivers, lakes, and the sea, turning it into water vapor (a gas). Think about how quickly puddles disappear after rainfall on a sunny day – that's evaporation! Condensation: As the water vapor rises, it cools down and turns back into tiny water droplets. These droplets collect together to form clouds. Imagine seeing steam from your cooking pot – that's condensation. Precipitation: When the clouds become too full of water droplets, the water falls back to the Earth as rain, snow, sleet, or hail. In Ghana, we mostly see rain. Collection: The rainwater flows into rivers, lakes, and the sea, and the cycle starts all over again. We also collect this water into our dams for use in our homes. The Life Cycle of a Plant (e.g., Maize): Many of you have seen maize grown in your farms or homes. Let's look at the cycle: Seed: The cycle starts with a maize seed. Germination: When the seed is planted in the soil and watered, it starts to grow. Growth: The plant grows taller, develops leaves, and becomes a mature maize plant. Reproduction: The maize plant produces cobs with kernels (seeds). Seed dispersal: The kernels are harvested, and some are planted to start a new cycle.
Why are Cycles Important?