Question

Answer the following questions:
i) Which gaseous component of air does not support burning?
11) Which component of air is essential for respiration?
ii) Which component of air is used by green plants for making food?
iv) Which component of air condenses on coming in contact with a cool surface?
Q.21. The height of a person is 1.75 m. Express it in cm.
OR
The distance between Radha's home and her school is 2356m. Express it in km.
2
(Copy)
Q.22. What are luminous objects? Give two examples.
2
Q.23. Why should an electrician use rubber gloves while repairing an electric switch at home?
Explain. Book - Rogeroof?
2
OR
Why do the handles of tools like pliers or screwdrivers used by electricians have rubber
covers on them?
24. How is cactus adapted to survive in a desert? (Any two points)
2
2
25. Write any two properties of a magnet. 126
5. Why does a lump of cotton wool shrink in water?
i) What is the SI unit of length?
6 Cary)
ii) Why can a pace or footstep not be used as a standard unit of length?
2
3
ORव्हाट इज द मीन बाय सोलर सिस्टम मीन बाय सोलर सिस्टम ​

Answer 1

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