This question tests understanding of 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. In this scenario, Marcus is biking far ahead and needs to be warned quickly about danger. The problem is he is too far away to hear voice and facing forward so might not see visual signals from behind. The correct answer says "A whistle sound can warn Marcus quickly from behind" which accurately identifies that a loud, sharp sound signal like a whistle can travel the distance and be heard even when Marcus is facing away. This shows understanding that sound signals work well for warnings when someone is facing away or at distance. Wrong answers like "A quiet whisper can warn Marcus quickly from behind" are incorrect because whispers are too soft to travel distance or be heard while biking - this shows misunderstanding of how sound volume affects communication over distance. Students might choose these if they do not understand that distance requires louder sounds or that biking creates wind noise. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Practice recognizing when talking does not work: test how far different sounds travel outdoors. Show examples: bike bells, car horns, and whistles are all designed to warn people who might not see danger coming.

This question assesses the skill 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. Simple signals can communicate simple messages like "come here," "yes/no," "stop," or "time to do something." In this scenario, Mom needs to communicate with Emma who is upstairs with her door closed. The problem is there is a floor and door barrier in the way. Talking does not work because voice cannot be heard through closed doors and floors. The correct answer says "Mom can ring a bell to mean, “Dinner time!”" which accurately identifies the solution is a sound signal to communicate through barriers. A distractor like "Emma can talk louder, and Mom will hear upstairs." is wrong because it claims talking would work when the scenario shows barriers prevent it. Students might choose this if they think talking always works. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Practice recognizing when talking does not work: stand far apart (cannot hear), close door between (barrier), make noise (too loud to hear over). Brainstorm: "When talking does not work, what else could we use? Light? Sound?" Show examples: school bells signal class time, traffic lights signal stop/go, whistles signal referee calls - all communicate without talking. Connect to engineering: identifying problem is first step in designing solution. Watch for: students who think talking always works regardless of distance/barriers, or who do not recognize this as communication problem.

This question assesses the skill 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. Simple signals can communicate simple messages like "come here," "yes/no," "stop," or "time to do something." In this scenario, Emma is upstairs while Mom is downstairs cooking. The problem is there is a floor barrier between them and Mom cannot leave her spot. Talking does not work because it is inconvenient to walk there each time and voice may not carry through the floor. The correct answer says "Mom needs to send “Time for dinner!” to Emma upstairs." which accurately identifies the communication problem is barrier and inconvenience, and the message is about timing. This shows understanding that when talking does not work due to distance or barriers, signals using light or sound can carry messages farther or through different conditions than voice. An error type like "Mom needs to send “Turn on the TV!” to the dog." is wrong because it focuses on irrelevant detail like communicating with an animal instead of the actual problem. Students might choose this if they focus on interesting but unrelated details. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Practice recognizing when talking does not work: stand far apart (cannot hear), close door between (barrier), make noise (too loud to hear over). Brainstorm: "When talking does not work, what else could we use? Light? Sound?" Show examples: school bells signal class time, traffic lights signal stop/go, whistles signal referee calls - all communicate without talking. Connect to engineering: identifying problem is first step in designing solution. Watch for: students who think talking always works regardless of distance/barriers, or who do not recognize this as communication problem.

This question assesses the skill 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. Simple signals can communicate simple messages like "come here," "yes/no," "stop," or "time to do something." In this scenario, Maya is far outside while the teacher is inside, and they need to communicate a message like coming inside. The problem is they are too far apart with a barrier like the building in the way. Talking does not work because the voice would not carry that far through the walls. The correct answer says "The teacher can flash a light or ring a bell to say, “Come in.”" which accurately identifies the communication problem is distance and barrier, and the solution is light or sound signal. This shows understanding that when talking does not work due to distance or barriers, signals using light or sound can carry messages farther or through different conditions than voice. An error type like "The teacher can just yell louder so every class hears." is wrong because it claims talking would work when the scenario shows it would not due to distance and barriers. Students might choose this if they do not understand distance or barriers prevent voice from carrying. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Practice recognizing when talking does not work: stand far apart (cannot hear), close door between (barrier), make noise (too loud to hear over). Brainstorm: "When talking does not work, what else could we use? Light? Sound?" Show examples: school bells signal class time, traffic lights signal stop/go, whistles signal referee calls - all communicate without talking. Connect to engineering: identifying problem is first step in designing solution. Watch for: students who think talking always works regardless of distance/barriers, or who do not recognize this as communication problem.

This question tests the skill 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. In this scenario, Mom needs to communicate "Time for dinner" to Emma who is upstairs. The problem is there is a floor/ceiling between them. Talking does not work because voice would not carry well through the floor barrier. The correct answer says "Mom needs to send, 'Time for dinner,' to Emma upstairs" which accurately identifies the communication problem is distance/barrier and the specific message needed. This shows understanding that when talking does not work due to distance or barriers, signals using light or sound can carry messages farther or through different conditions than voice. Wrong answers like "Mom needs to send, 'Do your homework,' to Dad at work" are wrong because it identifies wrong type of problem - Dad at work is too far for any simple light/sound device. Students might choose this if they focus on interesting but unrelated details. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Practice recognizing when talking does not work: stand far apart (cannot hear), close door between (barrier). Watch for: students who think talking always works regardless of distance/barriers, or who do not recognize this as communication problem.

This question tests understanding of how barriers block sound communication (1-PS4-4). Communication means sending messages or information to others. Sometimes we cannot use talking because there are barriers in the way like walls, doors, or floors that block or muffle sound. When talking doesn't work due to barriers, we need signals that can penetrate or go around these obstacles. In this scenario, Emma is upstairs with her door closed and Mom is downstairs. The problem is there are two barriers - the floor/ceiling between levels AND the closed door - that would block or severely muffle Mom's voice. The correct answer says "Mom cannot talk because the door and floor block the sound" which accurately identifies both barriers preventing voice communication. This shows understanding that solid barriers interfere with sound travel. Wrong answers like "Mom can talk easily because they are in the same room" fail because they are NOT in the same room - Emma is upstairs and Mom is downstairs. Students might choose this if they misread or don't understand "upstairs/downstairs" means different rooms. Help students understand barriers by having them try talking through closed doors or between floors. Ask: "What happens to sound when it hits a wall or door?" "Why is it harder to hear?" Show how some sounds (like doorbells) are designed to be heard through barriers. Watch for students who don't understand how physical barriers block sound.

This question tests understanding of why talking fails as a communication method over distance (1-PS4-4). Communication means sending messages or information to others. Sometimes we cannot use talking because we are too far away and cannot hear, there is too much noise, there are barriers in the way, or it's inconvenient. When talking doesn't work, we can use light signals or sound signals to send messages over distance. In this scenario, Jamal needs to communicate with Carlos who is across the street. The problem is they are too far apart - the width of a street creates too much distance for normal talking to work effectively. The correct answer says "Jamal cannot talk because the street is too far to hear" which accurately identifies that distance prevents voice from carrying across the street. This shows understanding that physical distance limits how far our voices can travel clearly. Wrong answers like "Jamal can just yell louder and it will always be fine" fail because even yelling has limits - across a street is often too far for safe, clear communication by voice alone. Students might choose this if they think making sounds louder always solves distance problems. Help students identify communication problems by asking: "Where is each person?" "What's between them?" "Can voices travel that far?" Practice by having students try talking at different distances to experience how sound fades. Show how even yelling doesn't work past certain distances. Connect to real life: why do crossing guards use signs or whistles instead of just yelling? Watch for students who don't understand that sound weakens over distance.

This question tests the skill 1-PS4-4: Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance - identifying communication problem part. Communication means sending messages or information to others. Sometimes we cannot use talking because: too far away (cannot hear), too noisy (loud environment blocks voice), barrier in the way (walls, floors), or inconvenient (person cannot leave their spot). When talking does not work, we can use light signals (flashlight patterns, flags, lights) or sound signals (bells, whistles, drums, horns) to send messages over distance. In this scenario, Keisha needs to communicate "Stop!" to Marcus who is biking ahead. The problem is they are moving and separated by distance. Talking does not work because voice would not carry that far while biking. The correct answer says "Keisha can use a whistle to mean, 'Stop!'" which accurately identifies solution is sound signal. This shows understanding that when talking does not work due to distance or barriers, signals using light or sound can carry messages farther or through different conditions than voice. Wrong answers like "Keisha can stay quiet and hope Marcus sees the hole" are wrong because it suggests solution not using light/sound signal - hoping is not communication. Students might choose this if they do not recognize communication as the solution. Help students identify communication problems by asking: "Who needs to send a message?" "Where are they?" "Can they talk to each other? Why or why not?" Show examples: bike bells warn pedestrians, car horns warn other drivers - sound signals work when moving.

This question tests understanding of using sound signals to communicate between floors (1-PS4-4). Communication means sending messages or information to others. Sometimes we cannot use talking because of distance, noise, barriers like walls or floors between people, or inconvenience. When talking doesn't work, we can use light signals or sound signals to send messages through barriers. In this scenario, Dad is downstairs and needs to communicate "bedtime" to Sofia. The problem is there is a floor/ceiling barrier between them that would muffle normal talking, and it's inconvenient to walk upstairs each time. The correct answer says "Dad can ring a small bell to mean 'Bedtime now.'" which accurately identifies using a sound signal that can travel through the floor barrier better than voice. This shows understanding that certain sounds like bells can penetrate barriers and carry simple messages when agreed upon beforehand. Wrong answers like "Dad can paint the stairs blue to send the message" fail because painting is not a light or sound signal, and it's not a practical way to send time-sensitive messages. Students might choose this if they don't understand the difference between signals and permanent changes. Help students explore how sounds travel through barriers by ringing bells or knocking on walls from different rooms. Ask: "What sounds can you hear through the floor?" "How is a bell different from a voice?" Practice creating simple signal codes. Watch for students who confuse signals with decorations or permanent changes.

This question tests understanding of identifying the communication problem and message (1-PS4-4). Communication means sending messages or information to others. Sometimes we cannot use talking because of distance, noise, barriers like walls or floors, or inconvenience. When talking doesn't work, we can use light or sound signals to send messages. In this scenario, Emma is upstairs and Mom is downstairs, creating a barrier problem for communication. The problem is there is a floor/ceiling between them that blocks or muffles normal talking voices. The correct answer says "Mom needs to send 'Time for dinner!' to Emma upstairs" which accurately identifies both the recipient (Emma) and a realistic message (dinner time) that a parent would need to communicate to a child in another part of the house. This shows understanding of real communication needs in everyday situations. Wrong answers like "Mom needs to send 'Good morning!' to the sun" fail because the sun is not a person who can receive messages - this shows confusion about what communication means. Students might choose this if they don't understand that communication requires a sender and a receiver who can understand messages. Help students identify communication scenarios by asking: "Who is sending the message?" "Who needs to receive it?" "What information needs to be shared?" Practice identifying real vs. silly communication situations. Show examples of common household messages that need to travel between floors. Watch for students who don't distinguish between real communication needs and imaginative play.