These essential MCQ questions are selected from the most important topics in CBSE Class 6 Science 2026 as per the latest NCERT syllabus. Sections include Food: Where Does It Come From, Materials Around Us, The Living World, Motion and Measurement of Distances, Light Shadows and Reflections, and Electricity and Circuits. For truly unlimited daily MCQ practice, visit Vooo AI Education.
🌱 CBSE Class 6 Science
1Which part of the plant do we eat in the case of carrot?
Answer: B — Root
Carrot is a root vegetable — we eat the taproot of the carrot plant. Other root vegetables include radish, beetroot, and turnip. We eat stems in potato (tuber) and sugarcane. We eat leaves in spinach and cabbage. We eat flowers in cauliflower and broccoli. We eat fruits in tomato, mango, and apple. We eat seeds in wheat, rice, and peas.
Carrot is a root vegetable — we eat the taproot of the carrot plant. Other root vegetables include radish, beetroot, and turnip. We eat stems in potato (tuber) and sugarcane. We eat leaves in spinach and cabbage. We eat flowers in cauliflower and broccoli. We eat fruits in tomato, mango, and apple. We eat seeds in wheat, rice, and peas.
2Animals that eat both plants and other animals are called:
Answer: C — Omnivores
Omnivores eat both plants and animals. Examples: human beings, crows, bears, and cockroaches. Herbivores eat only plants — cow, goat, deer, rabbit. Carnivores eat only animals — lion, tiger, snake. Decomposers break down dead organisms — fungi and bacteria. This food habit classification helps us understand food chains and the flow of energy in ecosystems.
Omnivores eat both plants and animals. Examples: human beings, crows, bears, and cockroaches. Herbivores eat only plants — cow, goat, deer, rabbit. Carnivores eat only animals — lion, tiger, snake. Decomposers break down dead organisms — fungi and bacteria. This food habit classification helps us understand food chains and the flow of energy in ecosystems.
3Which of the following is a transparent material?
Answer: A — Clear glass
Transparent materials allow light to pass through completely, so objects can be seen clearly through them. Examples: clear glass, clean water, air. Translucent materials allow only some light to pass — butter paper, frosted glass, oily paper. Opaque materials do not allow light to pass — wood, cardboard, metals. Shadows are formed when opaque objects block light.
Transparent materials allow light to pass through completely, so objects can be seen clearly through them. Examples: clear glass, clean water, air. Translucent materials allow only some light to pass — butter paper, frosted glass, oily paper. Opaque materials do not allow light to pass — wood, cardboard, metals. Shadows are formed when opaque objects block light.
4The SI unit of length is:
Answer: C — Metre
The SI (Système International) unit of length is the metre (m). 1 metre = 100 centimetres = 1000 millimetres. 1 kilometre = 1000 metres. We use standard units to ensure measurements are the same everywhere. In ancient times, people used body parts like hand span and cubit to measure length, but these varied from person to person, making standard units necessary.
The SI (Système International) unit of length is the metre (m). 1 metre = 100 centimetres = 1000 millimetres. 1 kilometre = 1000 metres. We use standard units to ensure measurements are the same everywhere. In ancient times, people used body parts like hand span and cubit to measure length, but these varied from person to person, making standard units necessary.
5A shadow is formed when an object is:
Answer: C — Opaque
Shadows are formed when an opaque object blocks light. Three conditions are needed to form a shadow: a source of light, an opaque object, and a screen or surface. The shadow is always formed on the side opposite to the light source. The size and shape of the shadow depends on the position of the light source and the object. A luminous object produces its own light (like the Sun or a bulb).
Shadows are formed when an opaque object blocks light. Three conditions are needed to form a shadow: a source of light, an opaque object, and a screen or surface. The shadow is always formed on the side opposite to the light source. The size and shape of the shadow depends on the position of the light source and the object. A luminous object produces its own light (like the Sun or a bulb).
6Which of the following is a good conductor of electricity?
Answer: C — Copper wire
Copper is an excellent conductor of electricity and is widely used in electrical wiring. Other conductors include iron, aluminium, and gold. Insulators (poor conductors) include rubber, plastic, wood, and glass. Insulators are used to cover wires and make handles of tools safe. Pure water is a poor conductor but water with salts dissolved in it conducts electricity — which is why we should not touch electrical appliances with wet hands.
Copper is an excellent conductor of electricity and is widely used in electrical wiring. Other conductors include iron, aluminium, and gold. Insulators (poor conductors) include rubber, plastic, wood, and glass. Insulators are used to cover wires and make handles of tools safe. Pure water is a poor conductor but water with salts dissolved in it conducts electricity — which is why we should not touch electrical appliances with wet hands.
7Breathing roots found in mangrove plants are called:
Answer: A — Pneumatophores
Pneumatophores are special roots that grow upward out of waterlogged, oxygen-poor soil in mangrove plants (like Rhizophora). They have pores to absorb oxygen from the air for respiration. Prop roots (like in banyan tree) grow downward from branches for support. Taproots have a main central root. Fibrous roots are thin, branching roots of grasses and other plants.
Pneumatophores are special roots that grow upward out of waterlogged, oxygen-poor soil in mangrove plants (like Rhizophora). They have pores to absorb oxygen from the air for respiration. Prop roots (like in banyan tree) grow downward from branches for support. Taproots have a main central root. Fibrous roots are thin, branching roots of grasses and other plants.
8Which of the following is an example of periodic motion?
Answer: B — Motion of a pendulum
Periodic motion is motion that repeats itself at regular time intervals. A pendulum swings back and forth in the same time period repeatedly — it is periodic. Other examples: rotation of Earth, heartbeat, vibration of a guitar string. A car on a road, a falling stone, and a bird flying are non-periodic (they do not repeat in regular time intervals). The time for one complete oscillation of a pendulum is called its time period.
Periodic motion is motion that repeats itself at regular time intervals. A pendulum swings back and forth in the same time period repeatedly — it is periodic. Other examples: rotation of Earth, heartbeat, vibration of a guitar string. A car on a road, a falling stone, and a bird flying are non-periodic (they do not repeat in regular time intervals). The time for one complete oscillation of a pendulum is called its time period.
9Which nutrient is most important for building and repairing body tissues?
Answer: C — Proteins
Proteins are called body-building foods. They are essential for growth, repair of worn-out tissues, and making enzymes and hormones. Sources: milk, eggs, meat, fish, pulses, and legumes. Carbohydrates provide energy (rice, wheat, sugar). Fats provide stored energy and protect organs (butter, oil, nuts). Vitamins and minerals are needed in small amounts for regulating body functions and preventing deficiency diseases.
Proteins are called body-building foods. They are essential for growth, repair of worn-out tissues, and making enzymes and hormones. Sources: milk, eggs, meat, fish, pulses, and legumes. Carbohydrates provide energy (rice, wheat, sugar). Fats provide stored energy and protect organs (butter, oil, nuts). Vitamins and minerals are needed in small amounts for regulating body functions and preventing deficiency diseases.
10Which of the following is NOT a characteristic of living things?
Answer: C — Made of metal
Living things share common characteristics: they grow, respire, respond to stimuli, reproduce, excrete waste, require nutrition, and are made of cells. Being made of metal is not a characteristic of living things — all living organisms are made of cells composed of organic molecules like proteins, carbohydrates, lipids, and nucleic acids. Viruses are on the border of living/non-living as they can only reproduce inside a host cell.
Living things share common characteristics: they grow, respire, respond to stimuli, reproduce, excrete waste, require nutrition, and are made of cells. Being made of metal is not a characteristic of living things — all living organisms are made of cells composed of organic molecules like proteins, carbohydrates, lipids, and nucleic acids. Viruses are on the border of living/non-living as they can only reproduce inside a host cell.
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