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Comprehensive Class 10 Biology Lesson on Nutrition and Photosynthesis

Explore nutrition types, autotrophic nutrition, and the photosynthesis process, including raw materials, steps, and its importance in this 40-minute Class 10 biology lesson.

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Class 10 Biology – Bridge Course Day 3 • Topic: Nutrition & Autotrophic Nutrition • Subject: Life Processes • Duration: 40 Minutes
Learning Objectives • • Understand the concept of Nutrition • • Identify types of nutrition • • Explain Autotrophic Nutrition • • Understand the process of Photosynthesis
What is Nutrition? • Nutrition is the process by which organisms obtain food • and use it for energy, growth and repair of tissues. • Food is needed for: • • Energy • • Growth • • Repair
Types of Nutrition • 1. Autotrophic Nutrition • • Organisms prepare their own food • • Example: Green plants • 2. Heterotrophic Nutrition • • Organisms depend on other organisms for food • • Examples: Humans, Animals, Fungi
Autotrophic Nutrition • Autotrophic organisms prepare their own food • using simple inorganic substances. • Examples: • • Green plants • • Some bacteria
Photosynthesis • Photosynthesis is the process by which green plants • prepare food using sunlight, carbon dioxide and water • in the presence of chlorophyll.
Raw Materials for Photosynthesis • Plants require: • • Carbon dioxide – from air through stomata • • Water – absorbed by roots • • Sunlight – source of energy • • Chlorophyll – green pigment in leaves
Photosynthesis Equation • 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O • Products: • • Glucose (food for plants) • • Oxygen (released into atmosphere)
Steps in Photosynthesis • 1. Chlorophyll absorbs sunlight • 2. Light energy converts into chemical energy • 3. Water splits into hydrogen and oxygen • 4. Carbon dioxide converts into glucose
Importance of Photosynthesis • • Provides food for plants • • Releases oxygen into atmosphere • • Maintains balance of gases • • Forms the base of food chains
Quick Assessment • 1. What is nutrition? • 2. Name the two types of nutrition. • 3. What are the raw materials for photosynthesis? • 4. What is the food produced in photosynthesis?
Thank You • Next Class Topic: • Heterotrophic Nutrition • Nutrition in Human Beings