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  Chapter 10: Motion and Measurement of distances Keywords Q1. Give two examples each, of modes of transport used on land, water and air. Solution: Land- Train, Bus Water- Ship, Boat Air- Helicopter, Aeroplane Q2. Why can a pace or a footstep not be used as a standard unit of length? Ans. Pace or a footstep cannot be used as a standard unit of length because it varies from person to person. Q3. Arrange the following lengths in their increasing magnitude: 1 metre, 1 centimetre, 1 kilometre, 1 millimetre. Ans. 1 millimetre, 1 centimetre, 1 metre, 1 kilometre Q4. Give two examples of periodic motion. Ans. a) A needle of a sewing machine b) Pendulum Q5. The height of a person is 1.65 m. Express it into cm and mm. Ans. 1.65= 165 cm = 1650 mm Q6. The distance between Radha’s home and her school is 3250 m. Express this distance into km. Ans. 1km = 1000 m Hence 3250 m = 3.25 kms. Q7. While measuring the length of a knitting needle, the reading of the s...

  Ch 1: The green plant producer of food Q1. What is called the kitchen of the plants? Ans. Leaves are called the kitchen of plants Q2. Define leaf blade. Ans. The flat part of the leaf. Q3. What is midrib? Ans. The central vein of the leaf. Q4. How will you define photosynthesis? Ans. The process of making food by the plants in the presence of Sunlight and by the use of carbon dioxide, water and Minerals. Q5. What are parasites? Ans. Organisms which drive their food from other living organisms are called parasites. Q6. Draw the structure of the leaf showing its various parts Ans. Q7. What is needed by leaf to make food? Ans. Leaf needs Sunlight, Water air and Mineral to make food. Q8. How does dodder get its food? Ans. It takes the food prepared by the green plants. Q9. What is the function of stomata? Ans. Stomata help in the exchange of gases and transpiration Q10. From where do non-green plants get their food? Ans. Plants like mushrooms get their food fr...

  SOCIAL SCIENCE CH 1 Keywords 1. Tropical : Area is between two tropics 2. Island : land surrounded by the water from all sides. 3. Ocean : Very large body of water Answer the following questions Q1. What is the area of our country? Ans. 32, 87,263 sq. Km. Q2. What are the North-South and East-West extensions of India? Ans. North-South 3214 km East-West 2933 km Q3. Mention any five neighbouring countries of India? Ans. Nepal, Bhutan, Mumbai, China, Pakistan and Myanmar. Q4. Write a short note on the location of India. Ans. India lies in the Asia continent and it is surrounded by three seas. In the north, there are the Himalayan Mountains. It is situated in the Northern hemisphere.  Q5. Write down the physical features of India. Ans. India has regions that contain mountains, plains, deserts, plateaus and coastal plains. Q6. India is divided into 29 states and 9 union territories. Explain the statement with a suitable example. Ans. There a...