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Looking for MCQs? You're in the right place! Whether you're preparing for competitive exams, school boards or just aiming to improve your knowledge, we offer MCQs for all levels and subjects.
Answer: Oxygen
Oxygen is essential for human respiration, as it is used in cellular processes to produce energy.
Answer: Energy cannot be created or destroyed
The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or transformed.
Answer: Hydrogen
Hydrogen is the most abundant element in the human body, found primarily in water molecules (H2O).
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Answer: Moon
The Moon is Earths only natural satellite, orbiting around Earth and affecting tides and other natural phenomena.
Answer: Carbon dioxide
Carbon dioxide (CO2) is the gas responsible for the bubbles in carbonated drinks, creating the fizz and effervescence.
Answer: Internal balance
Homeostasis is the ability of living organisms to maintain stable internal conditions, such as temperature and pH, despite external changes.
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Answer: Electrical to light
In a light bulb, electrical energy is converted into light energy and a portion is also transformed into heat energy.
Answer: Igneous
Igneous rocks, such as granite and basalt, are the most common type of rock in Earths crust, formed from cooled molten lava or magma.
Answer: Liver
The liver is the primary organ responsible for detoxifying harmful substances in the body, such as alcohol and metabolic waste.
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Answer: Carbohydrates
Carbohydrates are the bodys main source of energy, providing glucose for cellular functions and physical activity.
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