🌟 Class 7 Science Curiosity – Chapter 10 Notes
🌿 Life Processes in Plants | Amresh Academy
📘 Introduction
🌱 1. Plant Growth
📈 How Plants Grow:
- New leaves 🌿
- New branches 🌳
- Increase in height 📏
- Thickening of stems
⚡ Essential Factors:
- 💧 Water → absorbed by roots
- ☀️ Sunlight → provides energy
- 🧪 Nutrients → minerals from soil
🌞 2. Photosynthesis
📌 Definition:
👉 Process by which plants make food (glucose) using sunlight
🔑 Requirements:
- ☀️ Sunlight
- 🍃 Chlorophyll
- 🌬️ Carbon dioxide (CO₂)
- 💧 Water
📦 Products:
- 🍬 Glucose → energy / stored as starch
- 🌬️ Oxygen → released into air
📐 Word Equation:
👉 Carbon dioxide + Water → (Sunlight + Chlorophyll) → Glucose + Oxygen
🌿 Main Site:
👉 Leaves (food factories)
🌍 Importance:
- Provides food 🌱
- Releases oxygen 🌬️
🍃 3. Role of Leaves
- Broad & flat → capture sunlight ☀️
- Contain chlorophyll
- Store food as starch
🌬️ 4. Gas Exchange
🔍 Stomata:
👉 Tiny pores on leaves
⚡ Functions:
- CO₂ enters for photosynthesis
- O₂ released
- Helps in respiration
🚰 5. Transport in Plants
🌿 Xylem:
🌿 Phloem:
📌 Importance:
👉 Ensures proper distribution of nutrients
🔥 6. Respiration in Plants
📌 Definition:
👉 Breakdown of glucose to release energy
⚡ Requirements:
- Glucose
- Oxygen
📦 Products:
- Carbon dioxide
- Water
- Energy
📐 Equation:
👉 Glucose + Oxygen → Carbon dioxide + Water + Energy
🧠 Key Point:
👉 Occurs day and night
🌍 7. Importance of Plant Processes
🌱 Photosynthesis:
- Produces food
- Releases oxygen
🔥 Respiration:
- Provides energy
🚰 Transport:
- Distributes water & food
🌬️ Gas Exchange:
- Maintains balance of gases
⚖️ Balance in Nature:
👉 Maintains CO₂ and O₂ levels
📌 Final Summary
👉 Plants perform important processes:
- Photosynthesis 🌞
- Respiration 🔥
- Transport 🚰
- Gas exchange 🌬️
👉 These processes help in:
- Plant survival 🌱
- Environmental balance 🌍
✨ Perfect for revision + exams + concept clarity 🚀
