CBSE Class 7 > Class 7 Videos > CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS
CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS Video Lecture
FAQs on CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS
| 1. What is photosynthesis? |  |
Ans. Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into glucose (a type of sugar) and oxygen. This process takes place in the chloroplasts of the plant cells and is essential for the plant's growth and survival.
| 2. How does photosynthesis occur in plants? | |
Ans. Photosynthesis occurs in plants through a series of steps. Firstly, the chlorophyll pigment present in the chloroplasts absorbs sunlight. This energy is used to convert water from the roots and carbon dioxide from the atmosphere into glucose and oxygen. The glucose is stored as food for the plant, while the oxygen is released into the air as a byproduct.
| 3. What are the raw materials required for photosynthesis? | |
Ans. The raw materials required for photosynthesis are sunlight, water, and carbon dioxide. Sunlight provides the energy needed for the process, while water is absorbed by the plant's roots from the soil. Carbon dioxide is obtained by the plant from the air through tiny pores called stomata present on the leaves.
| 4. Why is photosynthesis important for plants? | |
Ans. Photosynthesis is important for plants as it is the primary source of their food. Through this process, plants are able to convert sunlight into glucose, which is used for energy and growth. Additionally, photosynthesis releases oxygen into the atmosphere, which is essential for the survival of all living organisms.
| 5. How does the process of photosynthesis contribute to the oxygen level in the atmosphere? | |
Ans. The process of photosynthesis contributes to the oxygen level in the atmosphere by producing oxygen as a byproduct. During photosynthesis, plants release oxygen into the air, which is then utilized by animals and other organisms for respiration. This continuous cycle of oxygen production and consumption helps maintain the oxygen level in the atmosphere.
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Apr 20, 2026 Last updated
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CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS for Class 72026 is part of Class 7 preparation. The notes and questions for CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS have been prepared according to the Class 7 exam syllabus. Information about CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS covers all important topics for Class 72026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for CBSE- Science - Class 7- NUTRITION IN PLANTS – PHOTOSYNTHESIS.
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