Exploration : Entering the World of Secondary Science
CBSE · Class 9 · Science
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What is the main purpose of using models in science?
Which item is an example of a model used in physics?
Which statement best describes how cells are shown in biological models?
How is the Earth represented in earth science models?
Sample Questions
Why are some details deliberately ignored while building a scientific model?
Show answer
To keep the model simple enough for the question being studied
Ignoring some details is purposeful. It helps keep the model simple while still allowing a useful answer to be found.
Which quantity is represented by the symbol c in science?
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Speed of light
The symbol c is used for the speed of light.
What is the exact defined value of the speed of light?
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299792458 m/s
The speed of light is defined exactly as 299792458 m/s.
The symbol c for the speed of light comes from which Latin word?
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celeritas
The symbol c comes from the Latin word celeritas, meaning speed.
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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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