This inventor experimented for two years before finding a bamboo filament that lasted 1,200 hours.
Who is Thomas Edison?
This invention depended on finding the right filament that would glow without burning up too quickly.
What is the light bulb?
A ramp is an example of this simple machine.
What is an inclined plane?
This word means eager or excited.
What is avid?
Because of this invention, factories could run at night.
What is the light bulb?
After a serious car accident, this inventor began swimming in the sea and later helped invent equipment that allowed people to breathe underwater for hours.
Who is Jacques Cousteau?
This invention turned sound vibrations into electrical signals and then back into sound again.
What is the telephone?
This simple machine has a beam and a fulcrum.
What is a lever?
These are the people who supervise television production.
Who are producers?
Because of this invention, families gathered to listen to music and news together at home.
What is the radio?
This inventor studied art in college before becoming a scientist and helping Southern farmers improve their soil using crop rotation.
Who is George Washington Carver?
This invention succeeded because the inventors focused on controlling pitch, roll, and yaw.
What is the airplane?
This simple machine uses a wheel and rope to lift heavy objects.
What is a pulley?
This word means not significant or modest.
What is humble?
Because of this invention, doctors could finally see bacteria.
What is the microscope?
This inventor worked with composer George Antheil and developed frequency hopping to prevent enemies from blocking torpedo signals during World War II.
Who is Hedy Lamarr?
This invention was created by mixing tree bark, old cloth, and fishing nets into a paste that dried into thin sheets.
What is paper?
This simple machine has threads and turns circular motion into force.
What is a screw?
This word means detailed and complicated.
What is intricate?
Because of this invention, people could quickly call for help in emergencies.
What is the telephone?
As a teenager, this inventor improved a complicated military code called “night writing” into a simple raised-dot alphabet for people who are blind.
Who is Louis Braille?
This invention began when a shop owner experimented with a double-convex lens attached to a brass plate, and later allowed scientists to see single-celled organisms.
What is the microscope?
An ax blade is an example of this simple machine.
What is a wedge?
This word refers to a weighted, swinging lever that regulates the speed of a clock.
What is a pendulum?
Because of this invention, sailors could avoid getting lost at sea.
What is the clock?