Dr. Homi Bhabha Exam sample question paper for Class 6 with our comprehensive set 12 is designed specifically for students following the Maharashtra State Board curriculum, aligning perfectly with the textbooks for 4th, 5th, and 6th 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 medium 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.
What is the process by which plants prepare their food?
a) Photosynthesis
b) Respiration
c) Digestion
d) Germination
Answer: a) Photosynthesis
Explanation: Photosynthesis is the process by which green plants use sunlight, water, and carbon dioxide to produce food and release oxygen.Which part of a plant absorbs water from the soil?
a) Leaf
b) Stem
c) Root
d) Flower
Answer: c) Root
Explanation: Roots absorb water and nutrients from the soil and transport them to other parts of the plant.What is the shape of the Earth?
a) Flat
b) Sphere
c) Cubical
d) Oval
Answer: b) Sphere
Explanation: The Earth is an oblate sphere, slightly flattened at the poles and bulging at the equator.What is the source of energy for the water cycle?
a) Moon
b) Sun
c) Stars
d) Earth’s core
Answer: b) Sun
Explanation: The Sun’s heat causes water to evaporate, initiating the water cycle.
Which organ helps fish breathe underwater?
a) Lungs
b) Gills
c) Fins
d) Scales
Answer: b) Gills
Explanation: Fish use gills to extract oxygen dissolved in water.What is the primary function of the stem in plants?
a) Absorb water
b) Transport nutrients
c) Photosynthesis
d) Protect seeds
Answer: b) Transport nutrients
Explanation: The stem carries water and nutrients from the roots to the leaves and supports the plant structure.Which of the following animals lays eggs?
a) Dog
b) Cat
c) Snake
d) Whale
Answer: c) Snake
Explanation: Snakes are oviparous, meaning they lay eggs.Which gas is most abundant in the Earth’s atmosphere?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Helium
Answer: c) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere.What is a baby frog called?
a) Tadpole
b) Larva
c) Pupa
d) Hatchling
Answer: a) Tadpole
Explanation: A tadpole is the larval stage in the life cycle of a frog.Which part of the plant is responsible for reproduction?
a) Roots
b) Leaves
c) Flowers
d) Stem
Answer: c) Flowers
Explanation: Flowers contain reproductive organs that help in pollination and seed formation.What causes day and night?
a) Earth’s revolution
b) Earth’s rotation
c) Sun’s movement
d) Moon’s orbit
Answer: b) Earth’s rotation
Explanation: The rotation of Earth on its axis causes day and night.Which gas do humans exhale during respiration?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Hydrogen
Answer: b) Carbon Dioxide
Explanation: Humans exhale carbon dioxide as a waste product of cellular respiration.
What type of lens is used in a magnifying glass?
a) Concave
b) Convex
c) Cylindrical
d) Plane
Answer: b) Convex
Explanation: Convex lenses converge light rays and magnify objects.What is the SI unit of force?
a) Joule
b) Newton
c) Pascal
d) Watt
Answer: b) Newton
Explanation: Force is measured in newtons, named after Sir Isaac Newton.Which of the following is an example of chemical energy?
a) A moving car
b) A battery
c) A stretched rubber band
d) A spinning wheel
Answer: b) A battery
Explanation: A battery stores chemical energy that can be converted into electrical energy.What is the speed of light in a vacuum?
a) 3 × 10⁶ m/s
b) 3 × 10⁷ m/s
c) 3 × 10⁸ m/s
d) 3 × 10⁹ m/s
Answer: c) 3 × 10⁸ m/s
Explanation: The speed of light in a vacuum is approximately 3 × 10⁸ meters per second.Which of the following is NOT a form of energy?
a) Heat
b) Sound
c) Light
d) Friction
Answer: d) Friction
Explanation: Friction is a force, not a form of energy.What is the primary source of energy for Earth?
a) Wind
b) Sun
c) Fossil fuels
d) Water
Answer: b) Sun
Explanation: The Sun provides energy in the form of light and heat, driving most natural processes on Earth.Which of the following materials is a good conductor of electricity?
a) Rubber
b) Plastic
c) Copper
d) Wood
Answer: c) Copper
Explanation: Copper is a good conductor due to its free electrons, which allow electricity to flow easily.What is measured in hertz (Hz)?
a) Speed
b) Frequency
c) Energy
d) Force
Answer: b) Frequency
Explanation: Hertz is the unit of frequency, representing cycles per second.What happens when a white light passes through a prism?
a) Reflection
b) Dispersion
c) Diffusion
d) Absorption
Answer: b) Dispersion
Explanation: A prism splits white light into its constituent colors, a process called dispersion.Which of the following is a compound?
a) Oxygen
b) Water
c) Hydrogen
d) Gold
Answer: b) Water
Explanation: Water (H₂O) is a compound made of hydrogen and oxygen atoms bonded together.What is the pH of a neutral substance?
a) 0
b) 7
c) 14
d) 10
Answer: b) 7
Explanation: A neutral substance, like pure water, has a pH of 7.Which gas is produced when calcium carbonate reacts with hydrochloric acid?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Methane
Answer: b) Carbon dioxide
Explanation: The reaction produces carbon dioxide gas along with calcium chloride and water.What is the chemical formula of common salt?
a) Na₂CO₃
b) NaCl
c) KCl
d) MgCl₂
Answer: b) NaCl
Explanation: Common salt is sodium chloride, NaCl.Which element is essential for the formation of bones and teeth?
a) Iron
b) Calcium
c) Sodium
d) Potassium
Answer: b) Calcium
Explanation: Calcium is vital for strong bones and teeth.What is the process of converting a liquid into a gas called?
a) Condensation
b) Evaporation
c) Freezing
d) Melting
Answer: b) Evaporation
Explanation: Evaporation is the process where liquid turns into gas at its surface.Which of these is an example of a physical change?
a) Burning wood
b) Melting ice
c) Rusting iron
d) Digesting food
Answer: b) Melting ice
Explanation: Melting ice is a reversible physical change that does not alter the chemical composition.Which organ in the human body produces bile?
a) Stomach
b) Pancreas
c) Liver
d) Small intestine
Answer: c) Liver
Explanation: The liver produces bile, which helps in the digestion of fats.What is the basic structural and functional unit of life?
a) Tissue
b) Cell
c) Organ
d) System
Answer: b) Cell
Explanation: Cells are the building blocks of life and perform essential functions.What is the process by which plants lose water through their leaves?
a) Transpiration
b) Photosynthesis
c) Respiration
d) Germination
Answer: a) Transpiration
Explanation: Transpiration is the process of water loss in the form of vapor from plant leaves.What is the primary function of red blood cells?
a) Fighting infections
b) Transporting oxygen
c) Clotting blood
d) Producing energy
Answer: b) Transporting oxygen
Explanation: Red blood cells contain hemoglobin, which carries oxygen to body tissues.What type of teeth are used for cutting and biting food?
a) Molars
b) Premolars
c) Canines
d) Incisors
Answer: d) Incisors
Explanation: Incisors are sharp and flat, ideal for cutting and biting food.Which gas is essential for respiration?
a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Helium
Answer: b) Oxygen
Explanation: Oxygen is required by cells for energy production through respiration.What is the name of the process by which a seed grows into a new plant?
a) Germination
b) Fertilization
c) Pollination
d) Photosynthesis
Answer: a) Germination
Explanation: Germination is the development of a seed into a seedling under suitable conditions.
What is the chemical symbol for gold?
a) Au
b) Ag
c) Hg
d) Fe
Answer: a) Au
Explanation: The chemical symbol for gold is Au, derived from its Latin name Aurum.Which planet is known as the “Red Planet”?
a) Venus
b) Mars
c) Jupiter
d) Saturn
Answer: b) Mars
Explanation: Mars is called the Red Planet due to its reddish appearance caused by iron oxide on its surface.What is the primary component of natural gas?
a) Ethane
b) Methane
c) Propane
d) Butane
Answer: b) Methane
Explanation: Methane makes up the majority of natural gas.What is the unit used to measure electric current?
a) Volt
b) Ampere
c) Watt
d) Ohm
Answer: b) Ampere
Explanation: Electric current is measured in amperes, symbolized as “A”.Who is known as the “Father of Modern Physics”?
a) Isaac Newton
b) Albert Einstein
c) Galileo Galilei
d) Niels Bohr
Answer: b) Albert Einstein
Explanation: Albert Einstein is regarded as the Father of Modern Physics for his revolutionary contributions, including the theory of relativity.
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