1) Why do we need light? a) To keep us warm b) To see objects around us c) To sleep better d) To hear sounds 2) Light allow us to see when...? a) The sun sets. b) The sun rises. c) An object gives off its own light. d) An object reflect light into our eyes. 3) What are the sources of light? a) Moon, television, and water b) Sun, stars, and light bulbs c) Trees, rocks, and sand d) Star, thunder and clouds 4) Why are we able to see through some objects but not others? a) Because some objects are brightly colored b) Because some objects reflect light c) Because light can pass through some objects but not others d) Because some objects are hot 5) Which of the following materials allows light to pass through completely? a) Wood b) Clear Glass c) Metal d) Fabric 6) Which of the following materials allows some light to pass through? a) clear glass, clear plastic b) thin cloth, tracing paper c) metal, cardboard d) mirror, crystal  7) Which of the following materials does not allow light to pass through? a) clear glass, clear plastic b) thin cloth, tracing paper c) metal, cardboard d) mirror, frosted glass 8) What is an example of a transparent object? a) clear glass, clear plastic b) thin cloth, tracing paper c) metal, cardboard d) mirror, frosted glass 9) What is an example of a translucent object? a) Frosted glass b) Clear water bottle c) Mirror d) Solid rock 10) Which of the following best describes a mirror? a) Transparent object b) Translucent object c) Opaque object that reflects light d) Opaque object that absorbs light 11) How is a shadow formed? a) When light passes through an object b) When light is blocked by an object c) When light bounces off an object d) When light changes color 12) What determines the shape and size of a shadow? a) The object’s color b) The size of the object and the position of the light source c) The temperature of the light d) The heat and temperature 13) What happens to the shadow when the light source is moved farther away from an object? a) The shadow becomes larger b) The shadow disappears c) The shadow becomes smaller d) The shadow stays the same size 14) If an object is placed directly between the light source and the surface, what type of shadow is formed? a) No shadow b) A clear, sharp shadow c) A faint shadow d) A colorful shadow 15) What is the effect of the angle of the light source on the shape of the shadow? a) It has no effect b) It makes the shadow larger or smaller c) It changes the color of the shadow d) It makes the shadow disappear 16) What happens to the shadow when the light source is directly above the object? a) The shadow is larger b) The shadow stays the same size c) The shadow disappears d) The shadow is directly underneath the object 17) Can shadows be of different shapes and sizes? a) No, they are always the same b) Yes, they change with the position of the object and light c) Only some shadows can change d) No, shadows are only circular 18) Which of the following can affect the size of a shadow? a) The color of the object b) The brightness of the object c) The position of the light source d) The weight of the object 19) How can you demonstrate that the size of a shadow changes with the distance from the light source? a) By moving the light source closer and farther from the object b) By changing the color of the object c) By turning off the light d) By changing the temperature of the light source 20) What happens if you place an object close to a light source? a) The shadow is blurry b) The shadow is larger c) The shadow is smaller d) The shadow disappears 21) What happens if the light is reflected off a mirror? a) The shadow becomes darker b) The light is scattered in different directions c) The light bounces off in a different direction d) The light disappears 22) What is a light sensor used for in experiments? a) To measure the temperature of light b) To measure the brightness of light c) To measure the distance between objects d) To change the color of light 23) What does a datalogger connected to a light sensor measure? a) The time of day b) The speed of light c) The brightness of light passing through an object or place d) The color of the light 24) What type of object would allow all light to pass through it? a) Opaque object b) Transparent object c) Translucent object d) Reflective object 25) What is the effect of using a translucent object in front of a light source? a) It completely blocks the light b) It makes the light brighter c) It scatters the light d) It lets light pass through but blurs it 26) Which material is most likely to reflect light? a) Fabric b) Mirror c) Plastic d) Water 27) What kind of shadow is formed when light passes through a transparent object? a) No shadow b) A faint shadow c) A sharp shadow d) A colorful shadow 28) What factors affect the size of a shadow? a) The color of the object b) The distance between the light source and the object c) The angle of the light source d) The size and shape of the object 29) The closer the light source is to the object, what happens to the shadow? a) The shadow becomes larger and clearer. b) The shadow becomes smaller and blurry. c) The shadow stays the same size but becomes darker d) The shadow disappears completely. 30) When the screen is moved farther away from the object, what happens to the shadow? a) The shadow becomes larger and blurry. b) The shadow becomes smaller and clearer. c) The shadow disappears completely. d) The shadow stays the same size but gets darker. 31) To create a clear and sharp shadow, what condition is necessary? a) The light source must be a point source and the object must be opaque. b) The object must be transparent. c) The light source must be very far from the object. d) The screen must be very close to the object. 32) What happens to the shadow when the Sun is low in the sky, such as in the morning or evening? a) Shadows are shorter and point straight down. b) Shadows are longer and stretch away from the Sun. c) Shadows disappear completely. d) Shadows become blurry and indistinct. 33) Jason wants to create sharper shadows without changing the distance between the light source, object, and screen. Which of the following options will help him achieve sharper shadows? a) Use a larger light source. b) Use a dimmer light source. c) Move the light source farther from the object. d) Use a smaller, more focused light source.

Light and Shadow ... BuaPaiUnited

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