Vocabulary
What is another word for "to give off"?
Emit
What do we call the distance from peak to peak of a wave?
Wavelength
Your friend shows you a special kind of paper that can change color. He says that it will change color if it is out in the sun. How is this possible?
The paper can take in (absorb) energy from the light, causing it to change color.
Why are plants green?
Plants reflect green light
A type of light that has a shorter wavelength than purple light. This ray from the sun that can cause skin cancer.
Ultraviolet
A higher frequency wave will have a ________ wavelength.
Shorter
Sunscreen ___________ ultraviolet from the sun which protects our __________.
Absorbs, genetic material
Objects with more mass require ______ force to travel the same velocity as an object with less mass.
More
_______ carries energy from one place to another.
Light
Property of a wave that determines the type of wave
Wavelength
Mr. Mailly is shopping for sunscreen. He's trying to decide on the 20 spf or 50 spf. Which one should he get and why?
50 spf because it will protect his skin by a factor of 50 more than without sunscreen.
How does fiber optic communication work?
Fiber-optic cables are made of strands of reflective glass coated with a protective substance. Sound waves are converted to digital waves. The light bounces along inside the strands of glass.
The number of peaks of a wave that pass by per second.
Frequency
What changes the intensity of a wave?
Amplitude
Jimmy says the black crow is reflecting all colors of light and that's why it is black. Is this true?
False. The crow is absorbing all colors of light.
How is a rainbow formed?
Visible light rays from the sun reflecting and refracting at different angles through a raindrop
When a light ray hits a surface, what are three directions it could go? What are the three words to describe those directions?
1. Absorb - take in
2. Reflect - bounce off
3. Transmit - go through
Curved line that shows the characteristics of a wave
Waveform
Will is learning about a new kind of plastic used to make models. He learns that infrared light is absorbed by the plastic, X-ray light is transmitted through the plastic, and visible light is reflected off the plastic. Will wonders if the plastic will melt if he shines the lights on it.
The plastic will melt with infrared light only.
The ray with the smallest wavelength on the electromagnetic spectrum is called?
Gamma rays