Stars
This is the process the Sun uses to produce energy.
What is nuclear fusion?
These waves have the highest energy.
What are gamma rays?
The bouncing of waves off a surface is called this.
What is reflection?
This theory states the universe began from a hot, dense point.
What is the Big Bang Theory?
The main fuel used by stars.
What is hydrogen?
A low-mass star becomes this after leaving the main sequence stage.
What is a red giant?
These electromagnetic waves are used in microwave ovens.
What are microwaves?
This occurs when waves bend around an object.
What is diffraction?
This phenomenon shows galaxies moving away from Earth.
What is redshift?
Hydrogen atoms combine to form this element during fusion.
What is helium?
This type of star is hot but dim.
What is a white dwarf?
This type of radiation is used in hospitals to view bones.
What are x-rays?
The distance from crest to crest is called this.
What is wavelength?
A light year measures this.
What is distance in space?
This is the stage where stars spend most of their lives.
What is the main sequence?
This explosive event occurs when a massive star dies.
What is a supernova?
These waves have the longest wavelength.
What are radio waves?
The number of waves passing a point each second is this.
What is frequency?
Redshift supports the idea that the universe is doing this.
What is expanding?
This protective material blocks harmful x-ray radiation.
What is lead?
This object can form after a supernova if the remaining mass is extremely large.
What is a black hole?
As wavelength decreases, this property increases.
What is energy?
This effect explains why wavelengths change when objects move.
What is the Doppler Effect?
Most stars begin forming inside one of these giant clouds of gas and dust.
What is a nebula?
This remains after a low-mass star sheds its outer layers.
What is a white dwarf?