Class 9 CBSE Science Model Test
(Physics, Chemistry & Biology)
1. When is work said to be done against the force of gravity ?
2. What is the kinetic energy of an object?
3. Write an expression for the kinetic energy of an object.
4. Define 1 watt of power.
5. If an atom contains one electron and one proton, will it carry any charge or not?
6. Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?
7. How will you find the valency of chlorine, sulphur and magnesium?
8. Why are we normally advised to take bland and nourishing food when we are sick?
9. What Precautions Can You Take in Your School to Reduce the Incidence of Infectious Diseases?
10. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field ?
11. Write an expression for the kinetic energy of an object.
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