- Read about Sofia. In the dark, she could not see her toy car. When her flashlight shined, she could see it. What did Sofia need to see the car?
Answer: A bright flashlight to shine light on it
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light; light shines on objects and bounces into our eyes, which lets us see. In the dark with no light, objects are still there but we cannot see them because no light is bouncing off them into our eyes; when we turn on a light or open curtains, light hits the objects and we can see them. In this story, Sofia was in a dark room and could not see her toy car; when her flashlight shined, she could see it; the toy car didn't move or change - the lighting changed. The correct answer says "A bright flashlight to shine light on it" which correctly identifies that Sofia needed light to see the car; light makes objects visible, and this is the key concept: illumination is necessary for vision. A distractor like "The car disappeared and was not there anymore" is wrong because it claims the object was absent when really the lack of light made it invisible; students might choose this if they think objects disappear in the dark instead of becoming invisible or don't understand light's role in vision. For teaching, do demonstrations: show an object in light, turn off lights safely, discuss how it's still there but invisible, then turn lights back on; use a flashlight in a dim room to 'reveal' objects and ask, 'Is the object gone or just invisible?' (just invisible) and 'What do we need to see things?' (light). Explain that light bounces off objects into our eyes - no light means we can't see; connect to everyday life like needing lights at night or a flashlight in dark closets, and watch for students who think objects vanish in the dark.
- Read about Jamal. With curtains closed, he could not see books. When he opened curtains, sunlight came in, and he could see them. Why could Jamal not see the books at first?
Answer: The room was dark, so he needed light to see.
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Jamal's room was dark with the curtains closed. He could not see the books. When he opened the curtains, sunlight came in and he could see the books. The books didn't move or disappear - the lighting changed. The correct answer says "The room was dark, so he needed light to see" which correctly identifies that darkness (lack of light) prevented seeing and light was necessary for vision. This is the key concept: illumination is necessary for vision. Wrong answers like "The books were gone from the shelf at first" are incorrect because they claim the books weren't there, when really they were always there but invisible in the dark. Students might choose this if they think objects disappear in darkness instead of becoming invisible. Do demonstrations: close curtains to darken room, show how books are still there but hard to see, then open curtains to let light in. Ask: "Did the books move?" (no). "What changed?" (the light). Connect to everyday experiences: dark rooms need lights turned on, opening curtains brings sunlight to see. Watch for students who think objects actually disappear in the dark.
- Read about Chen. At night he could not see his red ball. In morning sunlight, he could see it. When could Chen see the red ball?
Answer: When the sun came up and it was bright
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from the sun, it illuminates the objects, making them visible again. In this story, Chen was outside at night and could not see his red ball in the yard. In the morning, when the sun came up, he could see it. The ball didn't move or change; the lighting changed. The correct answer says 'When the sun came up and it was bright' which correctly identifies that light from the sun made the ball visible, as illumination is necessary for vision. A distractor like 'When the ball disappeared and came back' is wrong because it claims the object vanished and reappeared, when really the lack of light at night made it invisible; students might choose this if they think objects disappear in darkness instead of becoming invisible due to no light. To teach this, do demonstrations: show a ball at dawn, wait for sunrise safely, discuss how it's still there but invisible in dark, then see it in light. Use a flashlight at night to 'reveal' objects, and ask: 'Is the ball gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Jamal. Curtains closed, room was dark. Curtains open, sunlight made books visible. What did Jamal need to see the books clearly?
Answer: Light from the sun coming into the room
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from sunlight, it illuminates the objects, making them visible again. In this story, Jamal had curtains closed, making the room dark, and the books were not visible. When he opened the curtains, sunlight made them visible. The books didn't move or change; the lighting changed. The correct answer says 'Light from the sun coming into the room' which correctly identifies that sunlight provided the illumination needed for visibility. A distractor like 'The books to change into bigger books' is wrong because it attributes visibility to object change, not light; students might choose this if they confuse size or transformation with the role of light in vision. To teach this, do demonstrations: show books with curtains open, close them safely, discuss how they're still there but invisible, then open for sunlight. Use natural light to 'reveal' objects, and ask: 'Are the books gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Emma. Lamp off, room was dark. She could not see stuffed animals. Lamp on, she could see them. What made the stuffed animals visible?
Answer: The lamp light made them visible in the room
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from a lamp, it illuminates the objects, making them visible again. In this story, Emma was in her room with the lamp off, making it dark, and she could not see her stuffed animals. When she turned the lamp on, she could see them. The stuffed animals didn't move or change; the lighting changed. The correct answer says 'The lamp light made them visible in the room' which correctly identifies that light is needed to make objects visible, as illumination is necessary for vision. A distractor like 'The stuffed animals were not there before' is wrong because it claims the objects were absent, when really they were just invisible without light; students might choose this if they confuse darkness with object disappearance rather than lack of visibility. To teach this, do demonstrations: show stuffed animals in light, turn off the lamp safely, discuss how they're still there but invisible, then turn it back on. Use a lamp to 'reveal' objects, and ask: 'Are the stuffed animals gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Chen. At night, he could not see his red ball. In the morning sun, he could see it. When could Chen see the ball?
Answer: When the sun came up and made light
This question tests the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Chen could not see his red ball at night when it was dark. In the morning when the sun came up, he could see it. The ball didn't move or change - the lighting changed from dark night to bright morning. The correct answer says "When the sun came up and made light" which correctly identifies that sunlight provided the illumination needed to see the ball. Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "When the ball rolled away from the yard" are incorrect because they suggest the ball moved, when actually it stayed in place and only the lighting changed. Students might choose this if they think objects must move to become visible rather than understanding light is needed. Do demonstrations: use a ball in a darkened room, shine flashlight to show it's still there, turn on room lights to simulate sunrise. Ask: "Did the ball move overnight?" (no). "What changed?" (light from the sun). Explain: The sun provides light during the day that bounces off objects into our eyes. Nighttime = no sunlight = cannot see. Morning = sunlight returns = can see again.
- Read about Sofia. In the dark, her toy car looked invisible. When the flashlight shined, she saw the car. Why can we see things?
Answer: We see things when there is light on them
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Sofia's toy car looked invisible in the dark but became visible when the flashlight shined on it. The car didn't change - the light made it visible. The correct answer says "We see things when there is light on them" which correctly identifies the fundamental principle that light must shine on objects for us to see them. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "We see things only when they make sounds" are incorrect because they confuse different senses - we hear sounds but see with light. Students might choose this if they don't understand that seeing requires light, not sound. Do demonstrations: make sounds in the dark to show we can hear but not see. Turn on light to show now we can see. Ask: "Can sounds help us see?" (no). "What do we need to see?" (light). Explain the difference between hearing (ears detect sound) and seeing (eyes detect light).
- Read about Maya. At night, her room was pitch dark. She could not see her chair or dresser. When the bedroom light turned on, she could see them. What happens when there is no light?
Answer: Objects become invisible, even when they stay there
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Maya's room was pitch dark at night and she could not see her chair or dresser. When the bedroom light turned on, she could see them. The furniture didn't move or disappear - it just became invisible without light. The correct answer says "Objects become invisible, even when they stay there" which correctly identifies that objects don't disappear in darkness, they just become invisible due to lack of light. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "Objects move around the room by themselves" are incorrect because they suggest objects change position in darkness when actually they stay in place but become invisible. Students might choose this if they imagine darkness causes magical changes instead of simply preventing vision. Do demonstrations: turn lights off and discuss how furniture is still there even though we can't see it. Turn lights back on to prove nothing moved. Ask: "Did the chair move?" (no). "Is it still there in the dark?" (yes, just invisible).
- Read about Keisha. The power went out, and the kitchen was dark. She could not see the apples on the counter. When a candle was lit, she could see them. When could Keisha see the apples?
Answer: When the candle was lit and gave light
This question tests the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, the power went out making Keisha's kitchen dark, and she could not see the apples on the counter. When a candle was lit, she could see them. The apples didn't move or change - the candle provided light. The correct answer says "When the candle was lit and gave light" which correctly identifies that the candle's light made the apples visible. Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "When the apples rolled off the counter" are incorrect because they suggest the apples moved, when they stayed on the counter and only became visible with light. Students might choose this if they think objects must move or fall to be noticed. Do demonstrations: simulate power outage safely, use battery-operated candle to show how its light reveals objects. Ask: "When could Keisha see?" (when candle gave light). "Did apples move?" (no). Explain: Candles make light by burning. This light shines on nearby objects like apples, making them visible even when electric lights don't work. Connect to safety: real candles need adult supervision.
- Read about Jamal. The curtains were closed, and the room was dark. He could not see his books. When he opened the curtains, sunlight came in. What did Jamal need to see the books?
Answer: Light from the sun to make books visible
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Jamal could not see his books in the dark room with curtains closed. When he opened curtains to let sunlight in, he could see them. The books didn't move - they needed light to be visible. The correct answer says "Light from the sun to make books visible" which correctly identifies that Jamal needed sunlight (a light source) to see the books. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "The books to move closer to him" are incorrect because they suggest distance is the problem when actually lack of light prevented seeing. Students might choose this if they think objects need to be close to be seen, not understanding that even close objects are invisible without light. Do demonstrations: hold a book close in darkness to show even nearby objects need light. Open curtains or turn on light to make it visible. Ask: "Was the book too far away?" (no). "What did we need?" (light).
- Read about Marcus. Closet was dark, so shoes were invisible. He shined a flashlight and saw them. How did the flashlight help Marcus?
Answer: It made the closet bright so he could see
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from a flashlight, it illuminates the objects, making them visible again. In this story, Marcus was looking in a dark closet and could not see his shoes. When he shined a flashlight, he could see them. The shoes didn't move or change; the lighting changed. The correct answer says 'It made the closet bright so he could see' which correctly identifies that the flashlight provided the light needed for visibility, as illumination is necessary for vision. A distractor like 'It made the shoes appear out of nowhere' is wrong because it claims the objects magically appeared, when really the light just made them visible; students might choose this if they don't understand that objects remain present but invisible in the dark. To teach this, do demonstrations: show shoes in a lit closet, turn off lights safely, discuss how they're still there but invisible, then use flashlight. Shine a flashlight to 'reveal' objects, and ask: 'Are the shoes gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Emma. Her lamp was off, and she could not see stuffed animals. She turned on the lamp, and could see them. What made the stuffed animals visible?
Answer: The lamp light filled the room so she could see
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light; light shines on objects and bounces into our eyes, which lets us see. In the dark with no light, objects are still there but we cannot see them because no light is bouncing off them into our eyes; when we turn on a light or open curtains, light hits the objects and we can see them. In this story, Emma's lamp was off and the room was dark, so she could not see her stuffed animals; when she turned on the lamp, she could see them; the stuffed animals didn't move or change - the lighting changed. The correct answer says "The lamp light filled the room so she could see" which correctly identifies that light was needed to make the stuffed animals visible; this is the key concept: illumination is necessary for vision. A distractor like "The stuffed animals grew bigger on the bed" is wrong because it attributes visibility to object size changing when really the lighting changed; students might choose this if they confuse object properties with the need for light or don't understand light's role in vision. For teaching, do demonstrations: show an object in light, turn off lights safely, discuss how it's still there but invisible, then turn lights back on; use a flashlight in a dim room to 'reveal' objects and ask, 'Is the object gone or just invisible?' (just invisible) and 'What do we need to see things?' (light). Explain that light bounces off objects into our eyes - no light means we can't see; connect to everyday life like needing lights at night or a flashlight in dark closets, and watch for students who think objects vanish in the dark.
- Read about Marcus. His closet was dark, and he could not see shoes. He shined a flashlight, and he could see them. How did the flashlight help Marcus?
Answer: It made light, so the shoes became visible
This question tests the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Marcus's closet was dark and he could not see his shoes. When he shined a flashlight, he could see them. The shoes didn't move or change - the flashlight provided light. The correct answer says "It made light, so the shoes became visible" which correctly identifies that the flashlight's light made the shoes visible. Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "It pushed the shoes closer to the door" are incorrect because they suggest the flashlight physically moved the shoes rather than simply providing light. Students might choose this if they don't understand that flashlights make light, not push objects. Do demonstrations: use flashlight in darkened closet area, show how light beam reveals objects without touching them. Ask: "Does the flashlight touch the shoes?" (no). "What does it do?" (makes light). Explain: Flashlights create light that travels through air, hits objects, and bounces to our eyes. The light doesn't push or move things - it just makes them visible. Connect to everyday: using flashlights to find things in dark places.
- Read about Sofia. In dark, she could not see car. Flashlight on, she could see it. What did Sofia need to see the car?
Answer: Light from the flashlight helped her see it
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from a flashlight, it illuminates the objects, making them visible again. In this story, Sofia was in a dark room and could not see the toy car on the table. When she turned on the flashlight, she could see it clearly. The toy car didn't move or change; the lighting changed. The correct answer says 'Light from the flashlight helped her see it' which correctly identifies that objects need light to be visible, as illumination is necessary for vision. A distractor like 'The toy car disappeared from the table' is wrong because it claims the object vanished in the dark, when really the lack of light just made it invisible; students might choose this if they think objects disappear in darkness instead of understanding light's role in visibility. To teach this, do demonstrations: show an object in light, turn off the lights safely, discuss how it's still there but invisible, then turn lights back on. Use a flashlight in a dim room to 'reveal' objects, and ask: 'Is the toy car gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Chen. At night, he could not see his red ball. In the morning sunlight, he could see it. When could Chen see the ball?
Answer: When sunlight was out and it was bright
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Chen could not see his red ball at night when it was dark. In the morning when there was sunlight, he could see the ball. The ball didn't move or change - the lighting changed from dark night to bright morning. The correct answer says "When sunlight was out and it was bright" which correctly identifies that Chen could see the ball when there was sunlight providing illumination. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "When the ball rolled away from the yard" are incorrect because they suggest the ball moved, when actually it stayed in place and only the lighting changed. Students might choose this if they don't understand that light, not location, determines visibility. Do demonstrations: place a ball outside, observe it during day and at dusk/night (safely). Ask: "Is the ball still there at night?" (yes). "Why can't we see it well?" (no sunlight). Explain how sunlight during day lets us see outdoor objects, but at night without sunlight we cannot see them well.
- Read about Marcus. His closet was dark, so he could not see shoes. He shined a flashlight inside, and he saw them. How did the flashlight help Marcus?
Answer: It made light so the shoes were visible
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Marcus's closet was dark and he could not see his shoes. When he shined a flashlight inside, he could see them. The shoes didn't move or change - the flashlight provided light. The correct answer says "It made light so the shoes were visible" which correctly identifies that the flashlight provided illumination that made the shoes visible. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "It moved the shoes to the front of closet" are incorrect because they suggest the flashlight physically moved objects when it actually just provided light. Students might choose this if they don't understand that light, not movement, makes things visible. Do demonstrations: use a flashlight in a dark closet or box to "find" objects. Ask: "Does the flashlight move things?" (no). "What does it do?" (makes light). Show how the flashlight beam reveals objects wherever it shines.
- Read about Marcus. His closet was dark, so he could not see his shoes. He shined a flashlight inside. How did the flashlight help Marcus?
Answer: It made light, so the shoes became visible.
This question tests understanding of NGSS standard 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Marcus's closet was dark and he could not see his shoes. When he shined a flashlight inside, the light made the shoes visible. The shoes didn't move or change - the lighting changed. The correct answer says "It made light, so the shoes became visible" which correctly identifies that the flashlight provided light necessary for seeing. Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. An error like "It made the shoes move to the front" is wrong because it claims the flashlight caused movement when it actually provided light. Students might choose this if they think objects must move to be seen rather than needing light. Do demonstrations: darken a closet or box, place shoes inside, show they can't be seen, shine flashlight to reveal them. Ask: "Did the shoes move?" (no). "What did the flashlight do?" (made light). Explain: Flashlights make light beams that shine on objects so we can see them. Connect to everyday: we use flashlights to see in dark places like closets, under beds, or at night.
- Read about Sofia. Flashlight off, the toy car looked invisible. Flashlight on, she saw it. What happens when there is no light?
Answer: Objects become invisible and are hard to see
This question aligns with the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated, emphasizing the understanding that light is necessary for visibility. We can only see objects when there is light because light shines on them and bounces into our eyes, allowing us to perceive them. In the dark, with no light, objects are still present but invisible since no light reflects off them into our eyes. When we introduce light, like from a flashlight, it illuminates the objects, making them visible again. In this story, Sofia had her flashlight off, making the toy car look invisible in the dark. When she turned the flashlight on, she saw it. The toy car didn't move or change; the lighting changed. The correct answer says 'Objects become invisible and are hard to see' which correctly identifies that without light, objects are invisible, as illumination is necessary for vision. A distractor like 'Objects disappear and are no longer there' is wrong because it claims objects cease to exist in the dark, when really they are just not visible; students might choose this if they think darkness makes things vanish instead of understanding invisibility due to no light. To teach this, do demonstrations: show a toy in light, turn off flashlight safely, discuss how it's still there but invisible, then turn it back on. Use a flashlight to 'reveal' objects, and ask: 'Is the toy gone or just invisible?' (just invisible). 'What do we need to see things?' (light).
- Read about Amir. The bathroom light was off, and it was dark. He could not see the soap on the sink. When he turned on the light, he could see it. What happens when there is no light?
Answer: Objects become hard to see in the dark
This question tests the skill 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Amir was in a dark bathroom with the light off and could not see the soap on the sink. When he turned on the light, he could see it. The soap didn't move or change - the lighting changed. The correct answer says "Objects become hard to see in the dark" which correctly identifies that darkness makes objects difficult or impossible to see (but they're still there). Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "Objects disappear and are not there anymore" are incorrect because they claim objects actually vanish in darkness rather than just becoming invisible. Students might choose this if they think darkness makes things disappear instead of just making them unseeable. Do demonstrations: place soap on counter, turn bathroom light off and on. Ask: "Is the soap still there in the dark?" (yes). "What happens to objects in the dark?" (become hard/impossible to see). Explain: Dark means no light. Objects don't disappear - they're still there but we can't see them without light. This is why we need lights in bathrooms, especially at night.
- Read about Jamal. With curtains closed, his room was dark. He could not see his books. When sunlight came in, he could see them. Why could Jamal not see the books at first?
Answer: The room was dark, so no light showed them
This question tests understanding of 1-PS4-2: Make observations to construct an evidence-based account that objects can be seen only when illuminated - understanding light necessary for visibility. We can only see objects when there is light. Light shines on objects and bounces into our eyes, which lets us see. In the dark (no light), objects are still there but we cannot see them because no light is bouncing off them into our eyes. In this story, Jamal's room was dark with curtains closed, and he could not see his books. When sunlight came in through the curtains, he could see the books. The books didn't move or change - the lighting changed. The correct answer says "The room was dark, so no light showed them" which correctly identifies that the lack of light in the dark room prevented Jamal from seeing the books. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "The books disappeared from the shelf" are incorrect because they claim the objects weren't there when actually they were just invisible in the dark. Students might choose this if they think objects disappear in dark instead of becoming invisible. Do demonstrations: close curtains to darken room, show how books are still there but hard to see, then open curtains to let light in. Ask: "Did the books go away?" (no). "Why couldn't we see them?" (no light). Connect to everyday: nighttime needs lights, dark rooms need windows or lamps, opening curtains brings in sunlight to see.
