Question

SELF ASSESSMENT - I


CLASS : IX


SUBJECT : SCIENCE


INSTRUCTIONS:

1. Reference : Science 9 (NCERT)

2. Solve the assignment in any notebook or on any A-4 size sheet.



Chemistry (pg.1 to pg.5)


Q1. Whom do we call as matter? (pg. 1)

Q2. Give any two characteristics of particles of matter. (pg.2)

Q3. A drop of ink put into water gradually spreads and changes the colour of whole of
water.Name the property involved in the process. (pg.2)

Q4. In which case copper sulphate will dissolve faster and why?

a) Water at 10 0 C

b) Water at 60 0 C (pg.3)



Q5. 10g of sugar is added to 50ml of water taken in a beaker and stirred. Now answer:

a) Will sugar dissolve or settle down at bottom?

b) If sugar disappears, will the water level in the beaker rise?

c) Any conclusion that you can draw from the above experiment. (pg.3)

Q6. Attractive forces are ________ in solids. (fill in the blank) (pg.4)

Q7. Give an example of a substance whose density in liquid state is higher than that in solid

state. (pg.4)

Q8. Account for the following:

a) Particle motion increase with the rise in temperature.

b) Solids do not exhibit diffusion whereas gases do. (pg.4)


Biology (pg.57 to pg.62)


Q9 Name the scientists who propsed cell theory. Give two points of this theory. (pg.58)

Q10.Do you agree that “A Cell is a building unit of an organism”. If yes,why? (pg.59)
Q11. We eat food composed of all the nutrients like carbohydrates , protiens, fats vitamins,

minerals and water. After digestion , these are absorbed in the form of glucose , aminiacids,

glycerol etc . what mechanisms are involved in absorbtion of digested food and water? (pg59)

Q12. Why does the skin of your finger shrink when you wash clothes for a long time? (pg.60)

Q13. A person takes concentrated solution of salt, after some time, he starts vomiting. What

is the phenomenon responsible for such situation. Explain . (ref. internet)

Q14. Differentiate between cell membrane and cell wall functionally and structurally. (pg.61)

Q15. Draw well labelled diagram of Nucleus and write it’s functions. (pg.61)


Physics (pg.98 to pg.103)


Q16. Write any two points of difference between distance and displacement. (pg.99)

Q17. An athelete completes one round of a circular track of diameter 200m in 40 sec.

Calculate the distance covered and the displacement at the end of 2min 20sec. (pg 99)

Q18. Distinquish speed and velocity in tabular form. (pg. 101)

Q19. Define average speed and write its S.I unit. (pg.101)

Q20.What is meant by uniform acceleration. Also write its S.I unit. (pg.103)

Q21. Unit of time occurs twice in unit of acceleration . Give reason. (pg.103)

Q22. A bus decreases its speed from 80km/hr to 60km/hr in 5sec. Find the acceleration of the

bus? (pg.103)

Q23. A body can have zero average velocity but not zero average speed. Explain.

(Ref to internet).


SCIENCE is EXPLORE and LEARN​

Answer 1

Answer:

bro I'm in 7th class I will can't answer your question

Answer 2

Answer:

i can't understand it the first time seen this question