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What happens to the speed of light when it passed through a medium?
It slows down.
Why is the sky blue?
The blue wavelenght of visible light, scatters when it hits the particles in the atmosphere.
_________ matter will not transmit at all
opaque
_________ can transmit with scattering
translucent
_________ Matter can transmit light well.
transparent
T o F. We can see objects by the visible light they reflect.
True
If matter reflects all visible light, ......
it appears white
If matter absorbs all visible light, ......
it appears black
Which arrow shows transmission?
1
Which arrow shows reflection?
4
Which arrow shows absorption?
2
Which arrow shows scattering?
3
Why do astronauts helmets have a thin layer of gold in their helmets?
to protect them from harmful EM radiation in space.
How do we protect ourselves from harmful EM radiation, from the sun?
sunscreen, hats, pants, long-sleeved shirts, sunglasses
Why should humans protect themselves from UV radiation?
It can damage the skin, cause sunburns, cause cancer, and damage our eyes
What protects life on Earth from harmful EM radiation from the sun?
The atmosphere has the ozone layer that reflects/absorbs harmful radiation like x-rays and gamma rays.
An EM particle is electrically charged that disturbs .....
it disturbs both the electrical and magnetic fields
Which type of wave has the most energy?
 
visible light
 
microwaves
 
infrared waves
 
radio waves
Energy from the sun is called.
EM radiation
What is the order of the EM spectrum based on ascending order of frequency and desending wavelength,
radiowaves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, gamma rays
Describe the wavelenght and frequency for color violet
short wavelength and higher frequency
Describe the wavelenght and frequency for color red
long wavelength and lower frequency
Different wavelengths of visible light are interpreted as .......
different colors
What is visible light?
is made up of ROY G. BIV which combine equally to make white light
The energy from EM waves is called.....
EM radiation
EM waves travel .....
at the speed of light
What is luminosity?
It means the actual brightness of a star.
How is the universe structured?
It has clusters, or superclusters of galaxies and voids, that have not matter or energy.
What is a light-year?
It is the distance light travels in a year. It is used to measure vast differences.
What is a galaxy?
It is large collection of stars, gas and dust that is held together by gravity.
What galaxy does Earth belong to?
The Milky Way
Where is energy converted from matter to energy in a star?
the core
In which way do stars vary from each other?
 
all of these
 
compostion
 
size
 
temperature
What gases are stars composed of?
helium and hydrogen
What is a star?
It is a large celestial body that emits light and is composed of gases.
Why is Earth special?
 
all of these
 
It has liquid water, for the water cycle
 
the water cycle creates clouds for rain/snow
 
Earth's atmosphere has gases animals need to live
Describe terrestrial planets.
Terrestrial planets are all rocky, dense, and relatively small.
Describe a gas giant.
Large planets that have a thick, gaseous atmoshpere with small rocky cores.
What other celestial bodies are in our solar system, besides planets and the sun?
moons, dwarf planets (Pluto), comets, asteroids, meteroids
In our solar system, the four farthest planets from the sun are called
Gas giants
In our solar system, the first four planets are called?
Terrestrial planets
What is a planet?
It is a spherical body that orbits the sun.
What makes up the solar system?
It is collection of large and small bodies that orbit the sun or a central star.
Why is Earth special?
 
all of these
 
It has liquid water, that plants need to produce oxygen
 
plants are needed to pprduce oxygen that animals need to liv
 
Ozone layer absorbs/reflects harmful EM radiation


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