CLASS 9TH SCIENCE SA1

Greenwood Group of Schools

Subject-Science

Class-9^th

Time: 1 hr                                     SECTION-A                                  M.M:30

      (Chemistry)

• Answer the following question.

1.      Give reason that “Why a gas exerts pressure on the walls of the container”?

2.      What are alloys?

3.      Write the factors affecting evaporation?

4.      250 ml. of water contain 75 gm. of glucose. Find out the mass by volume percentage of solution?

5.      Write the fractional distillation method for the separation of two volatile liquids. Also draw neat and labeled diagram of the apparatus.

SECTION-B

(PHYSICS)

1.      What is acceleration? Write its SI unit.

2.      What is the nature of the distance-time graphs for the uniform and non-uniform motion of an object?

3.      Explain the motion of an object if its speed-time graph is a straight line parallel to the time axis.

4.      Abdul while driving to school computes the average speed for his trip to be 20 km/ hr. on his return trip along the same radium, there is less traffic and the average speed is 30 Km/hr. what is the average speed for Abdul’s trip.

5.      A driver of a car traveling at 52 km/h applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 sec. another driver going at 3 km/hr in another car applies his brakes slowly and stops in 10 sec. on the same graph paper, plot the speed versus time graphs for the 2 cars. Which of the 2 cars traveled farther after the brakes were applied?

SECTION-C

(Biology)

1.      How does an amoeba obtain its food?

2.      Where and how do the lipids and proteins constituting the cell member get synthesized?

3.      Which organelle is known as the power house of the cell and why .Explain it?

4.      Write down four differences between animal cell and the plant cell?