Lesson Notes By Weeks and Term v4 - SHS 2
PLANT SYSTEMS
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PLANT SYSTEMS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Biology
Class: SHS 2
Term: 2nd Term
Week: 20
Grade code: 2.4.2.LI.2
Strand code: 4
Sub-strand code: 2
Content standard code: 2.4.2.CS.1
Indicator code: 2.4.2.LI.2
Theme: SYSTEMS OF LIFE
Subtheme: PLANT SYSTEMS
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This lesson introduces the fundamental process of photosynthesis, the method by which plants produce their own food. In Ghana, where agriculture is the backbone of our economy and we are surrounded by lush greenery, understanding photosynthesis is crucial. It explains how our staple crops like maize, cassava, and yam grow, how our vital cocoa trees produce pods, and how the forests that protect our climate function. This lesson moves from simple observation of plant leaves to understanding the complex chemical process that sustains nearly all life on Earth.
What is Photosynthesis?
Photosynthesis is the process by which green plants, algae, and some bacteria manufacture their own food (glucose) using light energy from the sun, carbon dioxide from the atmosphere, and water from the soil. Oxygen is released as a by-product. "Photo" means 'light'. "Synthesis" means 'to make' or 'to build'. So, photosynthesis literally means "making with light".
The Equation of Photosynthesis:
It is vital to know both the word and chemical equations. Word Equation: Carbon dioxide + Water --(in the presence of Sunlight and Chlorophyll)--> Glucose + Oxygen Balanced Chemical Equation: 6CO₂ + 6H₂O --(in the presence of Sunlight and Chlorophyll)--> C₆H₁₂O₆ + 6O₂ Requirements for Photosynthesis