Class 9 Science Practice Questions

Q1. Which state of matter has a definite shape and definite volume? 🔬

1. Gas
2. Plasma
3. Solid
4. Liquid

Q2. What is the SI unit of force? 🔬

1. Newton
2. Pascal
3. Joule
4. Watt

Q3. An object moving with uniform velocity has: 🔬

1. Decreasing speed
2. Increasing speed
3. Zero acceleration
4. Non-zero acceleration

Q4. Which scientist proposed the atomic theory that all matter is made of atoms? 🔬

1. Rutherford
2. Newton
3. Bohr
4. Dalton

Q5. What is the chemical symbol for Sodium? 🔬

1. Na
2. Sd
3. So
4. Sn

Q6. Newton's first law of motion is also known as the law of: 🔬

1. Inertia
2. Momentum
3. Action and reaction
4. Gravitation

Q7. The process of conversion of a solid directly into vapour is called: 🔬

1. Sublimation
2. Condensation
3. Melting
4. Evaporation

Q8. Which of the following is a pure substance? 🔬

1. Seawater
2. Air
3. Gold
4. Soil

Q9. What is the acceleration due to gravity on Earth (approx)? 🔬

1. 9.8 m/s²
2. 8.9 m/s²
3. 10.8 m/s²
4. 6.7 m/s²

Q10. Which particle in an atom has no charge? 🔬

1. Electron
2. Neutron
3. Proton
4. Positron

Q11. Which organelle is called the powerhouse of the cell?

1. Mitochondria
2. Nucleus
3. Ribosome
4. Chloroplast

Q12. What is the SI unit of force?

1. Joule
2. Newton
3. Watt
4. Pascal

Q13. What is the SI unit of energy?

1. Newton
2. Watt
3. Joule
4. Ampere

Q14. What is the SI unit of power?

1. Joule
2. Newton
3. Volt
4. Watt

Q15. What is the chemical formula of water?

1. H₂O
2. H₂O₂
3. HO
4. OH

Q16. What is the chemical symbol of this element? Sodium

1. Ni
2. Na
3. Nb
4. No

Q17. How many bones are in the adult human body?

1. 201
2. 212
3. 206
4. 300