A. State whether the statements given below are True or False:1. Swinging of our arms or legs are periodic motions.2. Beating of our heart is non-periodic motion.3. Periodic motion helps us to measure time.4. In a circular motion; the objects or any of their parts move in a circular path.5. Motion of second’s hand of a clock is rectilinear.6. SI unit of length is ‘Foot’.7. For measuring large distances metre is not a convenient unit.8. Motion of a vehicle on a straight road is a rectilinear motion.9. Marchpast of soldiers in a parade is a periodic motion.10. Motion of second’s hand in a clock is a circular motion.11. In rotational motion whole body moves about an axis.12. The result of a measurement is expressed in two parts.13. Deficiency of vitamin A makes our bones weak.14. Deficiency of iron causes paleness.15. Calcium is necessary for strong bones and teeth.16. Deficiency of vitamin B helps to increase our appetite.17. Deficiency of vitamin D causes swollen and bleeding gums.18. Carbohydrates are the main source of energy in our diet.19. Expensive food is not always the best food20. Protein is a staple food.21. Haemoglobin is a carbohydrate.22. Cotton and paper are carbohydrates.23. Tomatoes contain vitamin C.24. Eating lady finger makes you good in mathematics.25. Paper can be recycled to get useful products.26. Drains get choked due to plastics thrown by us.27. Plastics give out harmful gases on heating or burning.28. Redworms eat upon green leaves on trees and make compost.29. Plastics are eco-friendly.30. Cooking of rice is a physical change.31. Breaking of a China (porcelain) dish is a chemical change.32. Rusting of iron is an irreversible change.33. Eruption of a volcano is a reversible change.34. Formation of clouds is an irreversible change.35. Conversion of a solid to liquid by heating is called fusion.36. Change of seasons is a natural change.37. Pressure is equal to the force per unit second.​