CBSE Sample Papers for Class 9

shabnams · #61 January 24th, 2019, 01:03 PM

As you are looking for CBSE Class 9 Science Sample Papers so on your demand I am providing same for you :

Section A

1. What is intercropping? (1)
2. Define biogeochemical cycle. (1)

Section B
3. List any three human activities which could lead to an increase in carbon dioxide
content of air. (2)
OR
Explain the role of the Sun in the formation of soil.
4. What is the significance of electronic configuration of an atom? (2)
5. Which of the following situations indicates Newtons first law of motion:
(a) A ball thrown upwards reaches a point and then starts falling.
(b) Passengers of the car feel a jerk when the driver applies emergency brakes.
(c) A gunman moving backwards as soon as the gun shoots a bullet.
(d) Formation of ripples on the surface of the lake when a stone is thrown into it. (2)

Section C
6. State the observations from the α-particle scattering experiment which led Rutherford
to make the following conclusions: (3)
a. Most space in an atom is empty.
b. Entire mass of an atom is concentrated at its centre.
c. Centre is positively charged. (2)
7. Explain any three methods of weed control. (3)
OR
What is green manuring? List two commonly used green manure crops and name two
macronutrients provided by green manure.
8. Give reasons: (3)
(a) A gas completely fills the vessel in which it is kept.
(b) A gas exerts pressure on the walls of the container.
(c) A wooden table should be called a solid.
9. Define and explain the differences between (3)
(a) Distance and displacement
(b) Speed and velocity
10. Although a stone and the Earth attract each other with equal force, why do we observe
that only the stone falls towards the Earth but not the Earth rising towards the stone?
Explain. (3)
11. A wooden cuboid has a mass of 8 kg. The length, breadth and height of this wooden
cuboid are 100 cm, 50 cm and 20 cm, respectively. Find the pressure on the floors on
which this block is kept. (3)
OR
Calculate the force of gravitation due to the Earth on a ball of 2 kg mass lying on the
floor. Consider the mass of the Earth = 6  1024 kg, radius of the Earth = 6400 km and
universal gravitation constant G = 6.7  10−11 Nm2/kg2. (3)
12. A silver ornament of mass ‘m’ gram was polished with gold equivalent to 1% of the
mass of silver. Calculate the ratio of the number of atoms of gold and silver in the
ornament. (3)
OR
Write the chemical formula of the following using the criss-cross method: (3)
a. Ammonium sulphate
b. Magnesium bicarbonate
c. Barium nitrate

CBSE Class 9 Science Sample Papers