All flashcards
Flashcard 1: Which option is better for communicating “help” from another room: flashing a light or yelling?
Answer: Yelling (a sound signal). Sound travels through walls when light cannot.
Flashcard 2: Which option is a common communication tool that uses light: flashlight or drum?
Answer: Flashlight. Flashlights produce light beams for visual signaling.
Flashcard 3: What is a sound signal (as used for communication)?
Answer: A message sent using sound, such as a bell, whistle, or voice. Sound waves carry information through air to our ears.
Flashcard 4: What is a light signal (as used for communication)?
Answer: A message sent using light, such as a flashlight blink. Light carries information visually, like flashes or patterns.
Flashcard 5: Which option is a common communication tool that uses sound: whistle or mirror?
Answer: Whistle. Whistles create loud sounds that travel far.
Flashcard 6: Which communication problem is best solved with sound: dark room or very noisy room?
Answer: Dark room. Sound travels through darkness when light cannot be seen.
Flashcard 7: Which communication problem is best solved with light: foggy air or very noisy room?
Answer: Very noisy room. Light signals work when sound cannot be heard over noise.
Flashcard 8: Identify the best signal to communicate across a playground when people are loud: clapping or waving arms.
Answer: Waving arms (a light/visual signal). Visual signals work best when sound is drowned out.
Flashcard 9: Identify the best signal to communicate when you cannot see the other person: waving or calling out.
Answer: Calling out (a sound signal). Sound reaches people even when they're not looking.
Flashcard 10: Which option describes a light-based solution to a communication problem: traffic light or school bell?
Answer: Traffic light. Traffic lights use colored lights to communicate rules.
Flashcard 11: Which option describes a sound-based solution to a communication problem: fire alarm siren or stop sign?
Answer: Fire alarm siren. Sirens use loud sounds to alert people of danger.
Flashcard 12: What communication problem does a traffic light help solve at an intersection?
Answer: It tells drivers when to stop or go to avoid confusion and crashes. Light signals organize traffic flow safely at busy crossings.
Flashcard 13: What communication problem does a school bell help solve during the school day?
Answer: It tells students when to start, stop, or change activities. Sound signals coordinate schedules across large buildings.
Flashcard 14: Which option is a light signal used to warn others: blinking hazard lights or humming?
Answer: Blinking hazard lights. Flashing lights grab attention to signal caution.
Flashcard 15: Which option is a sound signal used to warn others: smoke alarm beep or colored flag?
Answer: Smoke alarm beep. Loud beeps alert people to danger they can't see.
Flashcard 16: Identify the communication problem solved by a siren on an ambulance in traffic.
Answer: It alerts drivers to move aside for an emergency vehicle. Loud sirens cut through traffic noise to clear paths.
Flashcard 17: What is one way sound can be used to send a message when you cannot be seen?
Answer: A shout or whistle can send a message without being seen. Sound travels around obstacles that block light.
Flashcard 18: Which option is a light-based communication tool: flashlight, drum, megaphone?
Answer: Flashlight. Flashlights produce beams of light for signaling.
Flashcard 19: Which option is a sound-based communication tool: whistle, mirror flash, stoplight?
Answer: Whistle. Whistles create loud sounds to communicate messages.
Flashcard 20: What communication problem is solved by an emergency siren sound?
Answer: It warns people to be alert and make space for help. Loud sirens cut through traffic noise to warn everyone.
Flashcard 21: Identify the best signal type for this problem: You need to communicate at night from far away.
Answer: Use light, such as a flashlight beam or blinking light. Light signals travel farther than sound at night.
Flashcard 22: Identify the best signal type for this problem: You need to communicate across a noisy playground.
Answer: Use light, such as a raised bright sign or flashing signal. Visual signals work better than sound in noisy environments.
Flashcard 23: What is the best choice when a message must be sent quietly using light rather than sound?
Answer: Use a light signal, such as blinking a flashlight. Light signals are silent and won't disturb others.
Flashcard 24: What communication problem is solved by emergency vehicle flashing lights?
Answer: They warn others to move aside and pay attention. Flashing lights are visible from all directions to alert drivers.
Flashcard 25: Which option best solves this problem using light: You must guide someone to a safe exit in smoke.
Answer: Use bright exit lights or flashing lights to show the way. Bright lights cut through smoke better than sound directions.
Flashcard 26: Which option best solves this problem using sound: A person needs warning but is not looking at you.
Answer: Use a loud sound, such as a horn or shout. Sound gets attention even when someone isn't watching.
Flashcard 27: What is the best choice when a message must be sent around a corner where light cannot be seen?
Answer: Use sound, such as calling, clapping, or a whistle. Sound bends around corners while light travels straight.
Flashcard 28: Which option uses sound to communicate: doorbell chime, stop sign, flashlight beam?
Answer: Doorbell chime. Only the doorbell makes an audible signal.
Flashcard 29: Which option uses light to communicate: siren, whistle, blinking bike light?
Answer: Blinking bike light. Only the bike light produces visible signals.
Flashcard 30: Which method best solves this problem: you need to warn others in a dark hallway.
Answer: Use light signals, such as a flashlight. Light travels through darkness better than sound.