Class 7 Exam  >  Class 7 Videos  >  Science Class 7  >  Photosynthesis

Photosynthesis Video Lecture | Science Class 7

111 videos|246 docs|28 tests

Top Courses for Class 7

FAQs on Photosynthesis Video Lecture - Science Class 7

1. What is photosynthesis?
Ans. Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose molecules.
2. How does photosynthesis occur in plants?
Ans. Photosynthesis occurs in the chloroplasts of plant cells. Chlorophyll, a pigment in the chloroplasts, absorbs sunlight and uses it to convert carbon dioxide and water into glucose and oxygen.
3. Why is photosynthesis important for life on Earth?
Ans. Photosynthesis is essential for life on Earth as it is the primary way in which oxygen is produced and carbon dioxide is removed from the atmosphere. It is also the basis of the food chain, providing energy for all living organisms.
4. What are the two stages of photosynthesis?
Ans. The two stages of photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle). In the light-dependent reactions, light energy is used to split water molecules and produce ATP and NADPH. In the Calvin cycle, ATP and NADPH are used to convert carbon dioxide into glucose.
5. How do environmental factors such as light intensity and temperature affect photosynthesis?
Ans. Photosynthesis is influenced by factors such as light intensity, temperature, and the availability of water and carbon dioxide. Higher light intensity and optimal temperature levels can increase the rate of photosynthesis, while extreme conditions can inhibit the process.
111 videos|246 docs|28 tests
Explore Courses for Class 7 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Related Searches

Objective type Questions

,

mock tests for examination

,

Photosynthesis Video Lecture | Science Class 7

,

Semester Notes

,

Photosynthesis Video Lecture | Science Class 7

,

ppt

,

Viva Questions

,

study material

,

Exam

,

Extra Questions

,

Summary

,

Previous Year Questions with Solutions

,

past year papers

,

Important questions

,

Photosynthesis Video Lecture | Science Class 7

,

practice quizzes

,

video lectures

,

MCQs

,

Free

,

pdf

,

shortcuts and tricks

,

Sample Paper

;