Communication with Light and Sound
Help Questions
1st Grade Science › Communication with Light and Sound
A light wave can be used to send messages.
True
False
Explanation
This is a true statement. Light is used to communicate and send messages every day. Everyday crosswalk signs, lighthouses, traffic lights, and so many more help to send messages to people all around. Light is made of waves, and we can use these waves to keep people safe and pass information.
Where does sound come from?
Human-made and natural sources
Far away in our solar system
Only natural sources
Only human-made sources
Explanation
Sound comes from human-made and natural sources. An example of a human-made source would be a radio. An example of a natural source of sound would be a waterfall. The sound travels to our ears the same if it is human-made or natural.
A light wave can be used to send messages.
True
False
Explanation
This is a true statement. Light is used to communicate and send messages every day. Everyday crosswalk signs, lighthouses, traffic lights, and so many more help to send messages to people all around. Light is made of waves, and we can use these waves to keep people safe and pass information.
Where does sound come from?
Human-made and natural sources
Far away in our solar system
Only natural sources
Only human-made sources
Explanation
Sound comes from human-made and natural sources. An example of a human-made source would be a radio. An example of a natural source of sound would be a waterfall. The sound travels to our ears the same if it is human-made or natural.
Aly's teacher posts letters and words all over the room and she gives each student a laser pointer. She tells them she wants them to spell their name or pass a message to her without talking. What can the students do to communicate with only light?
Point at the letters or words with the laser to spell out the message
Shine the laser at their friends and the teacher
Get up and touch the letters or words to spell out the message
Explanation
This is an excellent example of how light can be used to communicate messages! Aly can use her laser pointer like a finger and point at the letters to spell her name or words to send the class a message. Without using sound, Aly can communicate to her teacher what she is thinking with this simple device!
Aly's teacher posts letters and words all over the room and she gives each student a laser pointer. She tells them she wants them to spell their name or pass a message to her without talking. What can the students do to communicate with only light?
Point at the letters or words with the laser to spell out the message
Shine the laser at their friends and the teacher
Get up and touch the letters or words to spell out the message
Explanation
This is an excellent example of how light can be used to communicate messages! Aly can use her laser pointer like a finger and point at the letters to spell her name or words to send the class a message. Without using sound, Aly can communicate to her teacher what she is thinking with this simple device!
What is an example of using sound to communicate and solve a problem?
Calling 911 when there is an emergency and talking to the operator
Singing a song to a friend on her birthday
Banging on a desk when you are angry
Explanation
Of all of the examples calling 911 during an emergency and talking to an operator is a way of communicating using sounds and solving a problem. The other choices make a sound, but there is no problem being solved. Many times we need to communicate with people over a distance, so inventions like the telephone help solve this issue.
What is an example of using sound to communicate and solve a problem?
Calling 911 when there is an emergency and talking to the operator
Singing a song to a friend on her birthday
Banging on a desk when you are angry
Explanation
Of all of the examples calling 911 during an emergency and talking to an operator is a way of communicating using sounds and solving a problem. The other choices make a sound, but there is no problem being solved. Many times we need to communicate with people over a distance, so inventions like the telephone help solve this issue.
Which device uses sound to communicate over a distance?
A string attached to two paper cups on either end
A set of handwave signals
A secret blinking code - blink once for no, and twice for yes
Explanation
One of the old-fashioned ways kids would communicate over a distance before there were cell phones and computers was to make their phones! You could attach two paper cups to either end of a string and use them to talk into and listen. The sound is transmitted, and friends could use them to speak across a yard or bedroom. The other options allowed people to communicate over a distance but were not using sound.
How could you improve the design of the lights in this photo to help the plane land safely?
More lights, brighter lights, and put them on both sides
Dimmer lights, shorter poles, and fewer lights
Lights on both sides that are rainbow colors
Explanation
The lights on the runway are intended to communicate where the safe place is for the plane to land. If it were to be improved, there could be more lights, brighter lights, and they could be added to both sides. Planes landing at night rely on these lights to get passengers to the ground safely. Part of the design process is making improvements on existing devices.