Dr. Homi Bhabha Exam sample question paper for Class 9 with our comprehensive set 9 is designed specifically for students following the Maharashtra State Board curriculum, aligning perfectly with the textbooks for 7th, 8th, and 9th standards. This sample question paper is designed to challenge students with in-depth, analytical questions from Maharashtra State Board, CBSE, ICSE, and IB textbooks, covering fundamental science concepts at a high difficulty level.
With questions set at a easy difficulty level, students can effectively enhance their understanding and confidence. Each question aims to challenge students while reinforcing their knowledge, making this resource invaluable preparing for DHBBVS.
1. Which of the following is not a form of energy?
a) Sound
b) Heat
c) Light
d) Water
Answer: d) Water
Explanation: Water is not a form of energy. It can be a medium through which energy is transferred (such as in hydroelectric energy), but it is not energy itself.
2. What happens to the size of a shadow when the light source is far from the object?
a) The shadow becomes smaller
b) The shadow becomes larger
c) The shadow disappears
d) The shadow stays the same
Answer: b) The shadow becomes larger
Explanation: When the light source is far from the object, the shadow formed is larger because the rays spread out more.
3. Which of the following is a renewable source of energy?
a) Coal
b) Solar energy
c) Oil
d) Natural gas
Answer: b) Solar energy
Explanation: Solar energy is renewable because it is sourced from the sun, which is continuously available.
4. Which part of the plant helps in absorbing water?
a) Leaf
b) Stem
c) Root
d) Flower
Answer: c) Root
Explanation: The roots of a plant absorb water and nutrients from the soil and transport them to other parts of the plant.
5. What is the process of turning a liquid into a gas called?
a) Freezing
b) Melting
c) Evaporation
d) Condensation
Answer: c) Evaporation
Explanation: Evaporation is the process where a liquid turns into a gas due to an increase in temperature or surface area.
6. Which gas do plants release during photosynthesis?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: a) Oxygen
Explanation: During photosynthesis, plants take in carbon dioxide and release oxygen as a byproduct.
7. What is the main function of the respiratory system?
a) Digestion of food
b) Transporting oxygen and nutrients
c) Filtering waste
d) Breathing and supplying oxygen to the body
Answer: d) Breathing and supplying oxygen to the body
Explanation: The respiratory system enables breathing and provides the body with oxygen while removing carbon dioxide.
8. What does the law of reflection state?
a) The angle of reflection is greater than the angle of incidence
b) The angle of incidence is equal to the angle of reflection
c) The angle of incidence is half of the angle of reflection
d) Light travels in a straight line
Answer: b) The angle of incidence is equal to the angle of reflection
Explanation: According to the law of reflection, the angle at which light hits a surface (angle of incidence) is equal to the angle at which it reflects off that surface (angle of reflection).
9. What is the SI unit of force?
a) Joule
b) Newton
c) Watt
d) Ampere
Answer: b) Newton
Explanation: The SI unit of force is Newton (N), which quantifies the amount of force applied to an object.
10. Which of the following is the chemical formula for methane?
a) CH₄
b) CO₂
c) C₆H₁₂O₆
d) H₂O
Answer: a) CH₄
Explanation: Methane is a simple hydrocarbon with the chemical formula CH₄, composed of one carbon atom and four hydrogen atoms.
11. Which system of the human body helps in regulating body temperature?
a) Digestive system
b) Excretory system
c) Nervous system
d) Integumentary system
Answer: d) Integumentary system
Explanation: The integumentary system, which includes the skin, helps regulate body temperature by sweating and controlling blood flow to the skin’s surface.
12. What is the main function of the xylem in plants?
a) Transport food
b) Transport water
c) Produce flowers
d) Store energy
Answer: b) Transport water
Explanation: Xylem is responsible for transporting water and dissolved minerals from the roots to the rest of the plant.
13. What is the formula for speed?
a) Speed = Distance × Time
b) Speed = Distance ÷ Time
c) Speed = Time ÷ Distance
d) Speed = Time × Mass
Answer: b) Speed = Distance ÷ Time
Explanation: Speed is calculated by dividing the distance traveled by the time taken to travel that distance.
14. Which of the following is the most abundant element in the Earth’s crust?
a) Oxygen
b) Silicon
c) Iron
d) Magnesium
Answer: a) Oxygen
Explanation: Oxygen is the most abundant element in the Earth’s crust, making up about 46% by weight.
15. What is the main component of Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
Answer: b) Nitrogen
Explanation: Nitrogen makes up approximately 78% of the Earth’s atmosphere.
16. Which process is responsible for the formation of clouds?
a) Evaporation
b) Precipitation
c) Condensation
d) Transpiration
Answer: c) Condensation
Explanation: Condensation is the process where water vapor cools and changes into liquid droplets, forming clouds.
17. What does the atomic number of an element represent?
a) The number of neutrons in the atom
b) The number of protons in the atom
c) The number of electrons in the atom
d) The number of molecules in a substance
Answer: b) The number of protons in the atom
Explanation: The atomic number represents the number of protons in an atom’s nucleus and determines the element’s identity.
18. In which part of the human brain is the control center for balance and coordination located?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Thalamus
Answer: b) Cerebellum
Explanation: The cerebellum is responsible for coordinating movement and maintaining balance.
19. Which part of the cell is responsible for energy production?
a) Nucleus
b) Mitochondria
c) Ribosome
d) Golgi apparatus
Answer: b) Mitochondria
Explanation: Mitochondria are known as the powerhouse of the cell because they generate most of the cell’s energy through respiration.
20. Which of the following is NOT a characteristic of metals?
a) Good conductors of heat and electricity
b) Malleable and ductile
c) High melting and boiling points
d) Poor conductors of heat
Answer: d) Poor conductors of heat
Explanation: Metals are good conductors of heat and electricity, and they tend to have high melting points and are malleable.
21. What is the SI unit of work?
a) Joule
b) Watt
c) Ampere
d) Newton
Answer: a) Joule
Explanation: The SI unit of work is the Joule (J), which is the amount of work done when a force of one newton moves an object one meter.
22. What is the charge of an electron?
a) Positive
b) Negative
c) Neutral
d) Depends on the atom
Answer: b) Negative
Explanation: Electrons have a negative charge.
23. What is the process of nuclear fusion?
a) Splitting of a nucleus
b) Combining of two nuclei
c) Emission of radiation
d) Release of energy
Answer: b) Combining of two nuclei
Explanation: Nuclear fusion is the process where two atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy.
24. The color of the sky appears blue because of the scattering of light. What is this phenomenon called?
a) Reflection
b) Refraction
c) Dispersion
d) Rayleigh scattering
Answer: d) Rayleigh scattering
Explanation: Rayleigh scattering explains why the sky appears blue, as shorter wavelengths of light (blue) scatter more than longer wavelengths.
25. Which of the following is the SI unit for electric current?
a) Volt
b) Ampere
c) Ohm
d) Coulomb
Answer: b) Ampere
Explanation: The SI unit for electric current is the Ampere (A).
26. Which of the following is a type of simple machine?
a) Pulley
b) Engine
c) Electric fan
d) Computer
Answer: a) Pulley
Explanation: A pulley is a simple machine that helps in lifting heavy objects by changing the direction of the applied force.
27. Which type of rock is formed by the cooling and solidification of magma?
a) Sedimentary
b) Igneous
c) Metamorphic
d) Fossilized
Answer: b) Igneous
Explanation: Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava).
28. Which gas is primarily responsible for global warming?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Methane
Answer: b) Carbon dioxide
Explanation: Carbon dioxide is a major greenhouse gas that contributes to global warming by trapping heat in the Earth’s atmosphere.
29. What is the unit of pressure?
a) Newton
b) Pascal
c) Joule
d) Watt
Answer: b) Pascal
Explanation: The unit of pressure is the Pascal (Pa), which is equal to one newton per square meter.
30. Which of the following is a good conductor of electricity?
a) Rubber
b) Glass
c) Copper
d) Plastic
Answer: c) Copper
Explanation: Copper is a highly efficient conductor of electricity.
31. Which of the following is a characteristic of an acid?
a) Bitter taste
b) Slippery texture
c) Sour taste
d) Does not react with metals
Answer: c) Sour taste
Explanation: Acids typically have a sour taste and react with metals to release hydrogen gas.
32. What is the process of heat transfer in a solid called?
a) Conduction
b) Convection
c) Radiation
d) Evaporation
Answer: a) Conduction
Explanation: In solids, heat is transferred by conduction, where heat moves from high to low-temperature areas.
33. Which substance is commonly used in the manufacturing of electric bulbs?
a) Copper
b) Tungsten
c) Aluminum
d) Silver
Answer: b) Tungsten
Explanation: Tungsten is used in electric bulbs because it has a high melting point and can withstand high temperatures.
34. What is the main function of white blood cells in the human body?
a) Transport oxygen
b) Fight infections
c) Clot blood
d) Produce hormones
Answer: b) Fight infections
Explanation: White blood cells are part of the immune system and help fight infections and diseases.
35. What is the formula for calculating the work done?
a) Work = Force × Distance
b) Work = Distance ÷ Time
c) Work = Force ÷ Distance
d) Work = Mass × Velocity
Answer: a) Work = Force × Distance
Explanation: Work is done when a force is applied to move an object over a distance.
36. Which of the following is a chemical reaction where a compound is broken down into simpler substances?
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Redox reaction
Answer: b) Decomposition reaction
Explanation: In a decomposition reaction, a compound breaks down into simpler substances, often under the influence of heat or a catalyst.
37. Who is known as the father of modern physics?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) Niels Bohr
Answer: a) Albert Einstein
Explanation: Albert Einstein is widely regarded as the father of modern physics due to his groundbreaking theories in relativity and quantum mechanics.
38. Which planet is known as the “Red Planet”?
a) Earth
b) Venus
c) Mars
d) Jupiter
Answer: c) Mars
Explanation: Mars is known as the “Red Planet” due to its reddish appearance, which is caused by the iron oxide (rust) on its surface.
39. What is the name of the first artificial satellite launched into space?
a) Apollo 11
b) Sputnik 1
c) Hubble Space Telescope
d) Voyager 1
Answer: b) Sputnik 1
Explanation: Sputnik 1, launched by the Soviet Union on October 4, 1957, was the first artificial satellite to be sent into space.
40. What is the chemical symbol for the element Gold?
a) Ag
b) Au
c) Ge
d) Ga
Answer: b) Au
Explanation: The chemical symbol for gold is Au, derived from the Latin word “aurum,” meaning shining dawn.
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