Waves Vocab
What is a wave?
A movement that carries energy through space.
What does transparent mean?
Lets all light through
What are pictures made of on a screen?
Pixels
What type of wave is made when you talk or sing?
Sound waves
What do we call the loudness of a sound?
Volume
What is amplitude?
The height of a wave or half the distance from crest to trough.
What does translucent mean?
Lets some light through
What kind of code uses only 1s and 0s?
Binary code
What kind of wave travels through the ground during an earthquake?
Seismic Waves
Which parts are wave parts: (4 parts)
Crest, trough, speed, size
What is a crest?
The top part of a wave.
What does opaque mean?
Lets no light through
Who used Morse code?
Samuel Morse’s telegraph.
What kind of wave allows us to see objects by bouncing light into our eyes?
Light Waves/reflected light
Why were Navajo soldiers important in World War II?
They used their language to send secret coded messages.
The bottom part of a wave.
What is reflection?
Light bouncing off a surface
Who were the WWII code talkers?
Navajo Soldiers
Binoculars and microscopes use curved glass to help us see things better. What are these pieces of glass called?
Lenses
Which made the telegraph possible? (Choose two)
• Electricity
• Morse code
What is a wavelength?
The distance between two crests or two troughs.
Why can you see an object?
Light reflects off the object and enters your eyes.
How do cell phones send messages far away?
As digital signals through towers and satellites.
Why can ships still use sound when fog blocks light from lighthouses?
Because sound waves travel better through fog than light waves.
Why can we see objects? (3 step process) 1→ 2→ 3
Light hits the object → reflects off it → enters our eyes.