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Earth, Moon, and the Sun 1. In Fig. 12.17, how many hours of sunlight do the North Pole and the South Pole receive during one rotation of the Earth? Answer: …

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Light: Shadows and Reflections 1. Which of the following are luminous objects? Mars, Moon, Pole Star, Sun, Venus, Mirror Answer:  The luminous objects are the Sun and the Pole Star. …

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Life Processes in Plants 1. Complete the following table Answer: 2. Imagine a situation where all the organisms that carry out photosynthesis on the earth have disappeared. What would be …

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Life Processes in Animals 1. Complete the journey of food through the alimentary canal by filling up the boxes with appropriate parts- Food → Mouth → ______ → Stomach → …

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Measurement of Time and Motion 1. Calculate the speed of a car that travels 150 metres in 10 seconds. Express your answer in km/h. Solution: Distance = 150 m Time …

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Heat Transfer in Nature 1. Choose the correct option in each case. (i) Your father bought a saucepan made of two diff erent materials, A and B, as shown in …

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Changes Around Us: Physical and Chemical 1. Which of the following statements are the characteristics of a physical change? (i) The state of the substance may or may not change. …

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Adolescence: A Stage of Growth and Change 1. Ramesh, an 11-year-old boy, developed a few pimples on his face. His mother told him that this is because of ongoing biological …

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The World of Metals and Non-metals 1. Which metal is commonly used to make food packaging materials as it is cheaper, and its thin sheets can be folded easily into …

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Electricity: Circuits and their Components 1. Choose the incorrect statement. (i) A switch is the source of electric current in a circuit. (ii) A switch helps to complete or break …

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