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 room light, it illuminates the objects, making them visible again. In this story, Maya was in her room at night with lights off, making it pitch dark, and she could not see her chair. When her mom turned on the light, she could see it. The chair didn't move or change; the lighting changed. The correct answer says 'There was no light, so she could not see' which correctly identifies that the absence of light prevented visibility, as illumination is necessary for vision. A distractor like 'The chair was hidden under a blanket' is wrong because it attributes invisibility to a physical cover, not lack of light; students might choose this if they focus on wrong causes like obstruction instead of light's role. To teach this, do demonstrations: show a chair in light, turn off lights safely, discuss how it's still there but invisible, then turn lights back on. Use a light switch to 'reveal' objects, and ask: 'Is the chair gone or just invisible?' (just invisible). 'What do we need to see things?' (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, 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.

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.

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).

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.

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 was in the dark and could not see her stuffed bear; when the lamp turned on, she could see it; the bear didn't move or change - the lighting changed. The correct answer says "The lamp light to make the bear visible" which correctly identifies that Emma needed light to see the bear; light makes objects visible, and this is the key concept: illumination is necessary for vision. A distractor like "The bear to be taken out of the room" is wrong because it claims the object was removed 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 confuse darkness with absence. 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.

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 shoes stayed in the back of the closet the whole time. In the dark he couldn't see them, but when the flashlight shined, he could see them. The shoes didn't move or change - only the lighting changed. The correct answer says "Only the light changed, not the shoes" which correctly identifies that the shoes remained in place and unchanged, with only the illumination changing. This is the key concept: illumination (light shining on objects) is necessary for vision. Wrong answers like "The shoes walked to the closet door" are incorrect because they suggest the shoes moved when actually they stayed in place and only became visible with light. Students might choose this if they imagine objects move in darkness or think visibility requires movement. Do demonstrations: place shoes in a box, shine flashlight to show they're in the same spot. Ask: "Did the shoes move?" (no). "What changed?" (the light). Emphasize objects stay put whether in light or dark.

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 sunlight came, he could see the ball. The ball stayed in the same place - only the lighting changed from dark night to bright morning. The correct answer says "Chen could see it when sunlight made the yard bright" which correctly identifies that sunlight (illumination) made the ball visible. Light makes objects visible. This is the key concept: illumination is necessary for vision. Wrong answers like "Chen could see it when he heard the ball bounce" are incorrect because they confuse hearing with seeing - we can hear things in the dark but cannot see without light. Students might choose this if they don't understand the difference between senses or think sound helps us see. Do demonstrations: put a ball outside, observe it in daylight, then observe the same spot at night (safely with adult). Discuss how the ball is still there but invisible without light. Ask: "Can you hear things in the dark?" (yes). "Can you see things in the dark?" (no). "Why?" (no light). Explain the difference between hearing (sound waves) and seeing (light waves).

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, Keisha could not see her shoes in the dark hallway. When she turned on the hallway light, she could see them. The shoes didn't move or change - the lighting changed. The correct answer says "Objects are still there but are hard to see" which correctly identifies that objects remain present but become invisible (hard to see) without light. Light makes objects visible. This is the key concept: illumination (light shining on objects) is necessary for vision. An error like "Objects disappear and are not there anymore" is wrong because it claims objects vanish in darkness when they actually just become invisible. Students might choose this if they think darkness makes things disappear rather than just making them invisible. Do demonstrations: place shoes in hallway, turn off lights (safely), discuss how shoes are still there but hard to see, turn lights on. Ask: "Do things disappear in the dark?" (no). "Are they still there?" (yes, just hard to see). Explain: Dark means no light, which makes things hard to see or invisible, but they don't go away. Watch for students who confuse "can't see" with "not there."

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 in a dark closet and could not see his shoes. When he shined the flashlight, he could see them. The shoes didn't move or change; the lighting changed. The correct answer says 'The flashlight light made the shoes visible' which correctly identifies that the light from the flashlight illuminated the shoes for visibility. A distractor like 'The shoes were not in the closet before' is wrong because it claims the objects were absent, when really they were invisible without light; students might choose this if they think darkness means things are gone instead of just not visible. To teach this, do demonstrations: show shoes in lit closet, darken it safely, discuss how they're still there but invisible, then use flashlight. Shine light to 'reveal' objects, and ask: 'Are the shoes gone or just invisible?' (just invisible). 'What do we need to see things?' (light).