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science

star

QuestionAnswer
what are the 5 characteristics of a star? size composition color and temp brightness distance
stars? stars are burning balls of gases
what are stars a result of? nuclear explosion called nuclear fission
nuclear fission? Hydrogen is converted to helium. two hydrogen atoms combine to form one atom of helium. this creates huge amounts of energy in the form of heat and light.
fission? the splitting of two hydrogen atoms
gravity? the force of attraction.
what does gravity cause? causes hydrogen atoms to collide and combine.
what is the cause of gravity? nuclear reaction
nebula? stars are formed or born in a nebula. massive cosmic clouds of matter form which stars are created.
light year? distance light travels in one year.
what is the speed of light? 186,000 miles/second
what are the five sizes of stars? neutrons white dwarf medium giant super giant
size of neutrons? 16 km in diameter
size of white dwarfs? 1/2 the diameter of earth
size of medium stars? 109 times the size of earth
size of giant star? 10 to 100 times the size of our sun
size of super giant? 100 to 1000 times the size of our sun.
the composition of a star? hydrogen- 60 to 80% helium- 19 to 39% 99% of a star is made up of hydrogen and helium
stars are composed mostly of what? gases
the composition of a star is determined by using what? spectroscope
spectroscope? an instrument which breaks light into its spectrum of colors (ROY G BIV) When an element burns, its light produces a characteristic set of lines when viewed through a spectroscope. These lines are like fingerprints which identify the burning element
the colors which stars burn? blue, white, yellow, orange, red
temperature at which the colors burn? blue- 35,000 C white- 10,000 C yellow- 6,000 C orange- 5,000 C red- 3,000 C
the life cycle of a star? *notes*
newborn star is called a? protostar
the amount of mass a star has determines what? how it will evolve and how long it will exist. a star will wind up as a black dwarf, a neutron star, or a black hole.
Created by: catanddog
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