Life Processes in Plants — Chapter Summary
CBSE · Class 7 · Science
Summary of Life Processes in Plants for CBSE Class 7 Science. Part of the CBSE Class 7 Science syllabus. Plants need food, water, and energy for growth.
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Overview
Plants need food, water, and energy for growth, just like other living things. A plant makes its own food by photosynthesis, moves water and food through special tissues, and releases energy by respiration. Leaves are the main food-making parts, but other green parts with chlorophyll can also photos
Key Concepts
Plants grow better when they get
Plants grow better when they get both sunlight and water. A plant kept in sunlight with water grows better than one kept in the dark with water. A pla
Leaves are generally broad
Leaves are generally broad, flat, and green. They store food in the form of starch. Chlorophyll in leaves captures sunlight and helps prepare food.
Photosynthesis is the process by
Photosynthesis is the process by which plants prepare food in the presence of sunlight and chlorophyll. Water and carbon dioxide are used, and glucose
Carbon dioxide from the air
Carbon dioxide from the air is essential for plants to prepare starch. If carbon dioxide is removed from around a leaf, that part does not form starch
A leaf is first decolourised
A leaf is first decolourised and then treated with iodine solution. A blue-black colour shows the presence of starch.
Learning Objectives
- Understand how plants grow and why sunlight and water are needed
- Explain how leaves make food by photosynthesis
- Identify the role of chlorophyll, sunlight, water, and carbon dioxide in food preparation
- Describe the starch test using iodine solution
- Recognise how oxygen is released during photosynthesis
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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