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Time allowed

1 hr 30 mins

Class IX – Science - Lesson 1,5 & 8

27 Jun 2018, 4.00 pm IST

MM

40

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1

Velocity time graph of an object is given below.

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What conclusion can be drawn about the velocity of the object?

1

2

What is cell? Who discovered it and how?

1

3

What is membrane biogenesis? Which organelle is involved in it and how?

2

4

Differentiate between eukaryotic and prokaryotic cells.

2

5

List two cell organelles which have their own supporting structures.

2

6

Name the state of matter which in which,

  1. Layers of particles can slide over each other.
  2. Particles just move around randomly because of very weak forces of attraction.

2

7

Can an object be accelerated, when it is moving with constant speed? If yes, give one example.

2

8

Differentiate between evaporation and boiling. How does evaporation cause cooling?

3

9

List differences between plant and animal cell.

3

10

What do you observe when a crystal of potassium permanganate is put in glass of water? What conclusion can you draw from this?

3

11

  1. How are bacteria and fungi able to survive in fresh water?
  2. What is plasmolysis ?
  3. What will happen to a dried rasin when it is put in (a) fresh water (b) salt solution.

3

12

How does gaseous exchange take place in the cells?

How does Amoeba acquire its food? Name the process.

3

13

Study the following graph and answer the questions

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  1. Which part of the graph shows accelerated motion? Calculate the acceleration.
  2. Which part of the graph shows retardated motion? Calculate the retardation.
  3. Calculate the distance travelled by the body in first 4 seconds of motion.

3

14

Derive the expression s = ut + ½ at2 graphically.

The brakes applied to a car produce a retardation of 6 m/s2. If the car takes 3 seconds to stop, calculate the distance travelled before the car stops.

5

15

  1. What happens when temperature of a solid is increased?
  2. Define latent heat of fusion.
  3. Which has more cooling effect, water at 0oC or ice at 0oC, why ?

5