Life Processes in Plants - Quick Look Revision Guide
Your 1-page summary of the most exam-relevant takeaways from Curiosity.
This compact guide covers 20 must-know concepts from Life Processes in Plants aligned with Class 7 preparation for Science. Ideal for last-minute revision or daily review.
Complete study summary
Essential formulas, key terms, and important concepts for quick reference and revision.
Key Points
Plants grow and need water, sunlight, and nutrients.
Plants absorb water from the soil and need sunlight and nutrients for growth and development.
Photosynthesis is the process by which plants make food.
It occurs in chlorophyll-containing leaves, using sunlight, carbon dioxide, and water.
Chlorophyll is essential for photosynthesis.
This green pigment captures sunlight, enabling the production of food in plants.
Plants store food as starch.
Starch, a carbohydrate, is produced in leaves and is a storage form of energy for plants.
The word equation for photosynthesis.
Sunlight + Carbon dioxide + Water → Glucose + Oxygen. This summarizes the process simply.
Stomata facilitate gas exchange in leaves.
These small pores allow carbon dioxide to enter and oxygen to exit during photosynthesis.
Water and minerals are transported via xylem.
Xylem vessels carry water and dissolved minerals from roots to leaves, essential for growth.
Food is transported through phloem.
The phloem distributes the glucose produced in leaves to other plant parts for energy.
Factors affecting photosynthesis.
Light intensity, carbon dioxide concentration, and temperature can influence the rate of photosynthesis.
Role of sunlight in plant growth.
Plants require sunlight for photosynthesis; without it, they cannot produce food or grow effectively.
Importance of water for plants.
Water is vital for photosynthesis and helps in nutrient transport within the plant.
Plants need air for photosynthesis.
Carbon dioxide, a key ingredient for food production, comes from the air and enters through stomata.
Oxygen is a byproduct of photosynthesis.
As plants produce glucose, they release oxygen, which is essential for most living organisms.
Decolourization test shows starch presence.
The iodine test, where a decolourized leaf turns blue-black, indicates starch production in leaves.
Growth of plants needs proper nutrients.
Nutrients from soil are absorbed by roots, vital for various physiological functions and growth.
Experiments can demonstrate principles.
Activities showcase how light, water, and carbon dioxide affect photosynthesis and plant growth.
Leaves are food factories of plants.
The broad, green leaves primarily carry out photosynthesis and store food as starch.
The process of destarching.
Keeping a plant in the dark for 2-3 days depletes its starch reserves, useful for experiments.
Other parts of plants contain chlorophyll.
Besides leaves, stems and even some roots can perform photosynthesis if they have chlorophyll.
Plants can adapt their growth based on conditions.
Environmental factors like light and water availability can affect plant growth rates and health.
