All Exams >
Class 9 >
Year 9 Physics (Cambridge) >
All Questions
All questions of Forces and Energy for Class 9 Exam
Which of the following energy resources does NOT depend on photosynthesis?- a) Biomass
- b) Coal
- c) Food
- d) Wind
Correct answer is option 'D'. Can you explain this answer?
a)
Biomass
b)
Coal
c)
Food
d)
Wind
|
Ramya G answered |
Wind is the correct option for the following reasons:
1. Biomass cannot be the correct option because, to make biomass, we require plants, and hence photosynthesis needs to take place
2. Coal also cannot be the correct answer because the formation of coal includes the compression of dead plants and trees over a million years ago
3. Of course, the formation of food needs the process of photosynthesis to take place so the plant can survive
Which one of the following is decreased when coal is burned?- a)Air pollution
- b)Carbon dioxide levels
- c)Oxygen levels
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Which one of the following is decreased when coal is burned?
a)
Air pollution
b)
Carbon dioxide levels
c)
Oxygen levels
d)
None of these
|
C K Academy answered |
Coal burning decreases oxygen levels due to the consumption of oxygen in the combustion process.
Chapter doubts & questions for Forces and Energy - Year 9 Physics (Cambridge) 2025 is part of Class 9 exam preparation. The chapters have been prepared according to the Class 9 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 9 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Forces and Energy - Year 9 Physics (Cambridge) in English & Hindi are available as part of Class 9 exam.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Year 9 Physics (Cambridge)
9 videos|20 docs|4 tests
|
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup