CBSE Class 9 Science Sample Paper Set I. It’s always recommended to practice as many sample papers as possible before the examinations. Students can download the sample papers and also question papers of previous years to practice and score better marks in examinations. Refer to other links too for more sample papers.

**SECTION - A**

1. Can the internal forces acting among the parts of a system change the linear momentum of the system ?

2. In which of the three media-air, water or steel does sound travel the fastest ?

3. A particle is moving with a uniform velocity. What is its acceleration ?

4. State two characteristics of matter demonstrated by :

(a) diffusion (b) Brownian motion

5. Define valence shell.

6. What are the fourth and fifth states of mater ?

7. If a bulb of 100 W is lit for 6 hours, how much electric energy would be consumed ?

8. A car moves through 10 km at a speed of 50 km/h and the next 10 km at a speed of 40 km/h. Calculate its average speed.

9. A dog barks in a park and hear its echo after 2.5 s. If the sound of its bark got reflected by a nearby building, find the distance between the dog and the building. Take the speed of sound in air as 340 m/s.

10. A man pushes a box of 50 kg with a force of 200 N. What will be the acceleration of the box due to this force ? What would be the acceleration if the mass is halved ?

11. Describe the drawbacks of Rutherford’s atomic model.

12. Differentiate between solid, liquid and gas on the basis of rigidity and compressibility ?

13. How much momentum will a dumb-bell of mass 15 kg transfer to the floor if it falls from a height of 19.6 m ? (Take g = 9.8 m/s^{2})

**Please click the link below to download CBSE Class 9 Science Sample Paper Set I**