Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
what causes a rainbow to be visible? |
when raindrops in the sky and light from the sun enters raindrops at a certain angle |
|
|
What are the colors of the rainbow in order |
red, orange, yellow, green, blue, indigo, violet |
|
|
what is the electromagnetic spectrum in order? |
Gamma, xray, ultraviolet radiation, visible light infrared, microwaves, radio waves, FM, AM |
|
|
electromagnetic waves |
a wave that can travel through matter or space |
|
|
gamma rays |
the highest-energy electromagnetic waves with the shortest wavelengths and highest frequencies |
|
|
Gamma rays are found ____ |
1. nuclear weapons 2. radioactive decay |
|
|
gamma rays are used to: |
1. kill bacteria and insects in food industry 2. see inside large steel shipping containers |
|
|
x-yrays |
penetrate through skin and muscle and make a shadow of denser tissues |
|
|
x-rays are used to see |
1. bones 2. teeth |
|
|
ultraviolet rays |
waves that are released by the sun |
|
|
name the 3 types of UV radiation |
1. UVA 2. UVB 3. UVC |
|
|
Some UV is good because it produces ____ |
Vitamin D, that strengthens bones |
|
|
the ozone layer blocks which of the UV rays |
UVC |
|
|
the ozone layer is made of |
oxygen (O3) |
|
|
what are some things that are harmful to the ozone layer |
pollution, forest fire, and spray cans |
|
|
visible light |
only electromagnetic wave that we can see, comes from the sun as white light |
|
|
colors of the rainbow |
red, orange, yellow, green, blue, indigo, and violet |
|
|
what is visible when white light bends |
the rainbow |
|
|
in science what are not colors |
white and black |
|
|
what makes objects black |
the object absorbs all of the light so no light is reflected |
|
|
what makes objects white |
the object reflects all light |
|
|
which wave of the rainbow has the longest wavelength |
red |
|
|
which wave of the rainbow has the shortest wavelength |
violet |
|
|
what are the 2 tools that bend white light |
1. prism 2. diffraction grating |
|
|
how do we see color |
we see the color that is reflected rather than absorbed by the object |
|
|
infrared waves |
electrons in atoms and molecules are vibrating to emit waves |
|
|
when electrons vibrate what is produced |
heat |
|
|
infrared waves show... |
body heat |
|
|
microwaves |
used to cook and send cell phone |
|
|
transverse waves |
waves that move up and down ex. water |
|
|
compressional waves |
waves that move back and forth |
|
|
rarefaction waves |
wave that are spread out after a compressional wave |
|
|
crest |
top of the wave |
|
|
trough |
bottom of the wave |
|
|
wavelength |
from crest to crest |
|
|
frequency |
how many crest pass a certain point in a given time |
|
|
amplitude |
from the mid-line to crest |
|
|
amplitude is defined as |
waves intensity |
|
|
hertz |
measure of sound / cycles per second |
|
|
dopplar effect |
change in sound as you move |
