PADMA SESHADRI BALA BHAVAN SENIOR SECONDARY SCHOOL
K.K NAGAR
STD: NINE
ASSIGNMENT SHEET (2017-2018)
ANSWER THE FOLLOWING QUESTIONS IN YOUR RESPECTIVE NOTE BOOKS
PHYSICS
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MOTION
What is motion?
Give an example where motion in inferred through indirect evidence.
What is meant by relative motion? Explain with one example.
Define: a) Distance b) Displacement c) Differentiate between them
Solve the following numerical : NCERT TEXT BOOK i. Page 100 – Qns1,2,3
ii. Page112-Qn1
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What is uniform and non-uniform motion?
Define- speed and velocity.
Differentiate between speed and velocity.
Give the formula to calculate the average speed of an object.
How will you calculate the average velocity of an object.
Solve the following: NCERT TEXT BOOK i. page 102-Qns 2,3,4,5.
ii. Page112-Qns 2, 3
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Define- acceleration.
Give example to describe uniform and non-uniform acceleration.
Differentiate between positive and negative acceleration
Give the formula to calculate acceleration of an object.
Solve the following: page103-Qns 2 ,3
What are scalar quantities? Give 2 examples
What are vector quantities? Give 2 examples
Give the S.I. units for the following physical quantities1)Distance 2)displacement 3)speed 4)velocity 5)acceleration
6)mass 7)weight 8)temperature 9)time 10)current
20. What are physical quantities? List the 7 basic physical quantities.
CHEMISTRY
MATTER IN OUR SURROUNDINGS
1. Define matter
2. What is ‘Panch tatva’?
3. How is matter classified on the basis of properties?
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List of the characteristics of particles of matter.
Define diffusion
On what factors does the rate of diffusion depend upon?
Which of the following is classified as matter?
Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.
8. The smell of hot sizzling food reaches you faster than the smell of cold food. Explain.
9. A diver is able to cut through water. Which property of matter does this exhibit?
10. Give two examples for
a) Substance which cannot exist in the gaseous state.
b) Substance which cannot exist in the liquid state.
c) Substance which cannot exist in the solid state.
11. What are the three states of matter? Explain their existence.
12. What about a rubber band, can it change its shape on stretching? It is a solid?
13. What about sugar and salt? When kept in different jars these take the shape of the jar.
Are they solid?
14. What about a sponge? It is a solid yet we are able to compass it. Why?
15. The rate of diffusion in liquids is higher than that of solids. Why?
16. The rate of diffusion increase with increase in temperature. Why?
17. What is pressure of gas due to?
18. Expand (i) CNG (II) LPG
19. A gas fills completely the vessel in which it is kept. Give reason.
20. A wooden table should be called a solid. Reason out.
BIOLOGY CELL – THE FUNDAMENTAL UNIT OF LIFE
21. 1) Who discovered cell? How was this observation made?
22. 2) Define cell. Name the smallest cell &largest cell.
23. 3) Who proposed cell theory and what does this theory convey?
24. 4) Name few unicellular organisms and how do they differ from multicellular organisms?
25. 5) Why is the cell called the structural and functional unit of life?
26. 6) What are organelles? Name three organelle that are seen in almost every cell.
27. 7) Distinguish between osmosis and diffusion.
28. 8 Why is the plasma membrane called a selectively permeable membrane?
29. 9) Define the following terms with suitable examples.
30. a) Imbibition
31. b) Hypotonic solution
32. c) Isotonic solution
33. d) Hypertonic solution
34. e) Endocytosis
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