PRAGYA GIRLS SCHOOL

HOLIDAY HOMEWORK

CLASS-IX

SCIENCE

(PHYSICS):

1.Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give an example of a body in uniform acceleration.

2.Find the total displacement of the body from the following graph:

3.A car travels at 54 km/h for first 20 s, 36 km/h for next 30 s and finally 18 km/h for next 10 s. Find its average speed.

4.Distinguish between uniform motion and non-uniform motion. Is uniformly accelerated motion uniform motion? Give one example each of uniform and non-uniform motion.

5.The speedometer readings of a car are shown below. Find the acceleration of the car and its displacement.

Time / Speedometer
9:25 am
9:45 am / 36 km/h
72 km/h

BIOLOGY:

Q1Write different crop varieties with their examples.

Q. 2 Make chart of improvement of crop .

Q.3 Write advantages and disadvantages of crop variety of improvement, crop production improvement and crop protection management.

SOCIAL SCIENCE:

Locate the following features on the political map of India.

1. All types of forests.

2. Different types of soil available in different state

CHEMISTRY:

CLASS IX WORKSHEET I
1.What are the conditions for something to be called matter. / :16.Why are gases highly compressible while solids are almost incompressible?
2.What are characteristics of particles of matter? / 17. Solids are normally not compressible . Why can be a sponge is readily pressed?
3.Can we smell hot food from a distance? Give reason. / 18. A substance x was highly compressible and could easily be liquefied. it could also take the shape of the container. Predict the nature of the substance
4.How the particles of matter attract each other? Explain. / 19.Explain why ice has lower density than water?
5.When crystal of copper sulphate is places at the bottom of the beaker containing water, the colour of water slowly become blue. / 20.Explain Random and continuous motion of particles in diffusion of matter.
6..Why does the level of the water not changed when common salt is dissolved in water. / 21.A certain substance “A’ cannot be compressed but takes up of the shape of any container in which it is placed. What will you regard its physical state?
7..Can you imagine the result in thirsty crow story. If the crow is adding salt in water in place of pebbles. / 22.Write full form of (1) C.N.G.(2)L.P.G.
8..What are the physical states of matter? / 23.A paper boat floats on water. Explain density of matter.
9.. Why a wooden table should be called solid? / 24. A small quantity of a gas is let into a large evacuated chamber.
a) How much of the chamber gets filled with the gas?
b) What property of the gas helps it to do so?
10..What is diffusion? Give an example. / 25.. List two processes from which it may be concluded that the particles of a gas move continuously.
11.Describe the activity to show that the particles of matter are very small? / 26.Among solids, liquids and gases which one has the maximum movement of molecules, the maximum intermolecular attraction and the minimum space between molecules.
12.A piece of chalk can be broken into small particles on hammering but it is not possible to do so in case of a piece of bar of iron. Explain? / 27.A substance has a definite volume but no definite shape? State whether this substance is a solid, a liquid or a gas?
13.What is common in the three states of matter?
14. Explain ? If we boil water copper sulphate dissolves faster. / 28Arrange in the order indicated for solid, liquid and gas.
(i) Effect of pressure-increasing order
(ii) Empty space in the particles – decreasing order
(iii) Tendency to flow- decreasing order
(iv) Thermal expansion- increasing order
15.Which physical state of matter is the densest one? / 29.Why solids do not possess fluidity?

MATHS:

Prepare a maths journal containing the following points.

  1. Evaluation of number system following journey from counting number to real number.
  2. Use your imagination and art skill to draw picture to support your write up of this journey.

ENGLISH:

Read the novel’ Three Men In A Boat’ by Jerome K Jerome and write a book review on the same.

fganh

iz’u1 ;k=k o`RrkarvFkok ;k=k laLej.kfyf[k, A

iz’u 2 dchj dh lkf[k;k¡ daBLFk ;kndhft,A

Computers (FIT-165)

Project on Ms-Word

Create a Project file using all word tools, containing Real Life assignment i.e.

  1. Report making on chapter one- characteristics of computer and new inventions.
  2. Poster Making on Functional Components of Computer.
  3. Letter writing Formal and Informal with formatting tools.

Take print out and arrange a file for the same.