Phones
What do we use phones for?
To talk to friends, play games, dogs can call owners when lonely.
What is the main idea of this video?
The main idea is how phones work.
Scientists learned that __________ could travel along a wire really fast.
Electricity
What is an "inventor"?
Someone who creates or discovers something.
True or False: There is a phone as big as a house and you need a crane to operate it.
True.
What is a "drawback" or "con" to sending a letter?
True or False: All sounds are made by vibrations.
True
What is a "crane"?
A large metal machine used for moving heavy objects.
True or False: Cell phones need to be attached to a wire.
False. Cell phones do NOT need to be attached to a wire.
How did people communicate with each other before phones?
Puffs of smoke that could be seen in the distance.
True or False: The voice is NOT made by vibrations.
False. The voice IS made by vibrations.
Tissue in the throat that produces voice.
Name 2 unique items that can be used to make music without instruments. HINT: Doug talked about these things at the end of the video in the bonus section.
Calculators, bridge, harp, rocks, tubes and a cell phone.
Who invented the telephone?
Alexander Graham Bell
Why do you have to speak louder when talking to someone who is far away?
You have to speak louder because sound vibrations do not travel very far.
What is a "telegraph"?
a system for sending messages from a distance along a wire