Science Revision Worksheet - Class IV PDF

ST. GEORGE’S SCHOOL ALAKNANDA, NEW DELHI 2024 – 2025 CLASS - IV SUBJECT: SCIENCE...

ST. GEORGE’S SCHOOL ALAKNANDA, NEW DELHI 2024 – 2025 CLASS - IV SUBJECT: SCIENCE TERM -II REVISION WORKSHEET- 1 CHAPTERS – 2,3 & 6 NAME: _____________________ ROLL NO: ______ CLASS & SECTION: ______________ DATE: ____________ QI. Fill in the Blanks. 1. When we go out in the rain we wear _____________ they are made of ________ material 2. Gently pouring liquid into another vessel after sedimentation is called_________________________. 3. In India there are three seasons ___________________ , __________________and___________________. 4. When thick clouds of tiny drops of water form just above land or water, __________________ 5. On heating when liquid water changes into water vapour, it is called________________________ 6. The sun causes changes in _______________________. 7. Moth balls or dried __________ _____________ protect silk or woollen clothes from the insects. 8. A push or a pull is called a __________. 9. ________________ and _________________ are natural fibres obtained from plants. 10. A scissors is an example of __________________________. 11. Noon is the _____________________ part of the day. 12. ____________________is the process of settling down of heavy insoluble impurities in a liquid. 13. The ______________ is a major source of energy. 14. _______________force is used when we walk. 15. Water is a precious _____________________ _____________________. 16. Even during one season the weather changes from ____________ today and sometimes from ________________to____________________. 17. Impurities that are heavier than water will settle at the bottom of the water leaving it clear this process is called _______________________. 18. Heat from the sun changes water in the rivers lakes and seas into ________________________ 19. Chemicals like chlorine are used to kill germs at the waterworks of the city this process of adding chlorine is called ____________________________. 20. ________ and ______ are natural fibres obtained from animals 21. When clouds become too heavy they fall as _____________________. 22. Atomic energy comes from the splitting of an ________________. 23. Two inclined planes attached back to back are called _____________________. 24. __________________________ fabrics are stretchable waterproof and wrinkle free. 25. Air currents are set up when ___________ air rises and cooler air takes its place. 26. When it is very cold the ________________ or the surface water freezes into tiny white crystals called as ________________Energy is the ability to do __________. 27. Water in wells and rivers have _________________ impurities, insoluble impurities and disease causing ______________ which makes it impure. 28. _______________ breeze comes from sea to land, during day time. 29. Land absorbs heat faster than ______________. 30. Clothes protect us from __________________, _________________and _________________. 31. When the atmosphere is extremely cold the water vapour falls as_____________________________. 32. A moving body slows down or stops on its own due to ______________________ ___________________. 33. Long ago humans used ______________ to cover themselves. 34. The _______________ causes changes in the weather. 35. At night the _______________ cools down faster than ___________________. 36. A simple machine that makes work easier and __________. 37. Patients clothes must always be ________________ with an antiseptic solution. 38. In nature the effect of evaporation and condensation of water can be seen as _______________,_____________, _____________ and _______________. 39. The level of underground water in an area is called _____________________________. 40. The interior of the Earth is called ___________________________. 41. _______________ is made from a wheel and a rope. 42. Clean clothes make us look ___________ and keep us ________. 43. __________________ is the condition of the atmosphere surrounding us at a particular time in terms of _________________, atmospheric pressure,_______________ and moisture. 44. _____________________ of the Earth’s surface is covered with water. 45. Fast and strong winds can cause ___________________________. 46. Coal and wood have ______________________ energy 47. Villagers use _________________to draw water from wells. 48. Woollen clothes prevent the body heat from ________________and keep our body warm. 49. The weather can be _____________, cold,______________ ,dry or ________________. 50. The moving air is called __________________.  51. Solar energy can be changed into electrical energy, ___________________________ and _______________. 52. When a force moves an object, __________ is done. 53. On cooling water vapour changes into liquid water.This process is called_______________. QII. Trace the error and rewrite the correct statement. 1. Clean clothes make us look dirty. Ans. ____________________________________________________________________ 2. A screw is not a simple machine. Ans. ____________________________________________________________________ 3. Solar energy comes from the Earth Ans. ____________________________________________________________________ 4. The national dress of Indian woman is pants and shirt. Ans. ____________________________________________________________________ 5. A lever makes work harder. Ans. ____________________________________________________________________ QIII. Match the following. S.No. COLUMN A Ans. COLUMN B a. Lever A grooved wheel with a rope b. Inclined plane Bottle opener c. Pulley Door knob d. Wheel and axle Slope QIV. Answer the following questions. 1. What is energy? Name the different sources of energy. Ans.___________________________________________________________________________ ____________________________________________________________________________ _____________________________________________________________________________ 2. How does a lever help us do work? Ans.___________________________________________________________________________ ____________________________________________________________________________ 3. What is force? Name four different types of forces. Ans.___________________________________________________________________________ ____________________________________________________________________________ 4. “We need energy.” Why? Give reasons to support this statement. Ans.___________________________________________________________________________ ____________________________________________________________________________ QV. Draw diagram to show one example of following: 1. Lever 2. Pulley 3. Wheel and axle