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5276850-3905251695450-390525Science Class 6Topic: Light And ShadowsReinforcement WorksheetName:_____________________Sec:_______________________Date:_____________________Q1. Choose the correct option in each of the following: Shadows are formed becauseOpaque objects reflect light.Opaque objects do not allow light to pass through them.Light propagates in one direction from the source.Light is allowed to pass through the object.Which of the following statements is true? Moon is a luminous object and reflects light of the sun towards the earth.Moon is a non luminous object and reflects light of the sun towards the earth.Moon is non luminous and does not reflect any light of the Sun towards the earth.Moon gives out its own light in the night and reflects sunlight during the day.Why do shadows made by the Sun change in size during the day time?Because the weather changes. Because the objects keep moving. Because the Sun appears to move across the sky each day. Because the amount of light, emitted by the Sun, keeps on changing.Shadows made by the Sun are:Shortest in the morning, when the Sun is rising. Shortest at midday, when the Sun is directly overhead. Shortest in the evening, when the Sun is setting. The same size throughout the day.What types of surfaces reflect light well?Smooth and shinyDull and dark Dark color and smoothRough and shinyWhich of these objects would reflect the most light?A rusty metal keyA wooden spoon A polish metal knife A glassHow do mirrors work?By reflecting the light that hits themBy absorbing the light that hits themBy letting through the light that hits them By reflecting the heatTo make a wall reflect as much light as possible, you should paint it ...BlackWhiteYellowGreen9) How does light travel? a. b. c. d. 10. The following diagram shows a child using a periscope to look at an object on the other side of the wall. Which diagram shows a correctly drawn ray of light from the object?11. A boy did the following experiment. He kept a wooden cube in front of a screen. He had three torches with himWithout changing the position of the cube and the screen, he placed the other two torches one after the other, in the position of torch 1, and saw the shadow.Which torch will make the largest (umbra) shadow on the screen?Torch 1Torch 2Torch 3The size of the shadow will be the same for all the three torches.Q2. Fill in the blanks.We can see our images on _________________ surfaces.If all the sun is blocked out, it is known as ____________________ eclipse.Light can easily pass through ____________________ material.Light changes direction when it is ______________________.Q3. State true / false. Rewrite the statement.A beam of light changes direction when it travels from one transparent medium to another because its distance changes. ( )________________________________________________________________________Light is a form of material which helps us to see things ( ) ________________________________________________________________________During lunar eclipse if whole sun seems to be blocked out so it is known as total eclipse solar. ( ) ________________________________________________________________________We can see objects because they reflect light. ( )________________________________________________________________________Q4- Give one word answer for the following questions.State the colour of the safety clothing which is worn by people who work near traffic._____________________________________________________________________Which surfaces reflect light better?_____________________________________________________________________What is the step taken to make any surface look smooth?_____________________________________________________________________What helps to show the direction of light?_____________________________________________________________________Q5. Place the words given in the box under the correct heading.Lightningfireworksstarfireflyburning logangler fishtorch-lightlampNatural light sourcesArtificial light sourcesQ6. Identify the objects as transparent, opaque or translucent. Television ________________________________Butter paper________________________________Aluminum foil________________________________Sun glasses________________________________Tree________________________________Mirrors________________________________Cling film________________________________Glass________________________________Door________________________________Q7. Match the following.S. No.Column AS. NoColumn BColumn C1.Luminousa.Objects which block light1. 2.Umbrab.Objects which allow light to pass through them partially2.3.Opaquec.Objects which emit light of their own.3.4.Translucentd.Shadow cast by the earth or the moon.4.Q8. Label and differentiate between the following diagrams.8788401270 __________________________________________ _________________________________________________________________________679450746125 _________________________________________________________________________ __________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________Q9. State two ways in which we can change size of a shadow.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Q10. Draw arrows to show how the boy will see;His image2213846163830Sun’s image4172585603042480695554355831215772757Q11. Sort the things in two groups given below. Light sourcesReflectors3009900-409575Q12. How are shadows formed?__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Q13. Identify the type of surface and the kind of reflection21272583820ABABType of surfaceType of ReflectionQ14. Draw arrows (representing light) on the pictures to show howthe boy can see the page of the book he is readingthe girl can see the picture on the walla. b. ................
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