The life cycle of stars and vocabulary. Mrs.McDermott's 2nd period science class
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What is a cloud of dust and gas in space? | Nebula
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| What begins to form out of a nebula? | Protostar
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| What kind of star fuses hydrogen into helium. Often called the adult form of the star? | Main-sequence star
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| When a red giant expands and is no longer able to hold onto its outer layer of gas, what is this outer layer of gas called? | Planetary nebula
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| What happens when a star uses up the supply of hydrogen and expands? | It becomes a red giant
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| When a stars core continues to shrink and the surface heats up, what is this new kind of star called? | White dwarf
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| What is it called when a white dwarf cools off? | A black dwarf
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| These have masses of 10 or more times the sun and luminosities from 30,000 to over a million times our sun. | Super giants
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| What is it called when a star has so much gravity that nothing can escape? | Black hole
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| What is the name of the star who is extremely small and dense,and is completely composed of neutrons? | Neutron star
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| What is an explosion that rips apart a star at the end of its life? | Supernova
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| What is a hot ball of gas held together by its own gravity? | Star
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| What is a number of stars that appear to form a pattern? | Constellation
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| What is the brightness of a star? | Magnitude
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| What is absolute magnitude? | The actual brightness of a star
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| What is apparent magnitude? | How bright a star looks from Earth
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| What is the apparent shift of an object's location when viewed from different places called? | Parallax
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| What is a light year? | The distance light travels in one year-9 trillion kilometers
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| A star's color is related to its_______ | Temperature
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| The coolest stars are________ | Red and orange
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| Warmer stars are________ | Yellow
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| The hottest stars are________ | Blue and white
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| Nuclear reactions within the star create______ | The light we see from the star
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| The star's high temperature cause it to_________ | Expand
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| Gravity causes the star to _______ at the same time as it's expanding | Contract
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| The H-R diagram compares what two elements of stars? | Temperature and absolute magnitude
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| Star begins its life in what stage? | Nebula
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| What does a star become after a nebula? | A Protostar
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| What happens when the center of a protostar reaches several million degrees? | It becomes a main-sequence star
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| What does a main-seqence star do? | Fuses hydrogen into helium
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| What has to happen in order for a main-sequence star for it to become a giant or a supergiant? | It will use up the supply of hydrogen in its core and will become a giant or supergiant-depending on its mass
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| What do stars with UP TO 10x the mass of our sun become as its final stages of its life? | First a red giant, then will not be able to hold its outer layers of gas and become a planetary nebula, then the final stage, a white dwarf
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| What do stars with MORE THAN 10x the mass of our sun become as its final stages of its life? | Either a supernova or a black hole, depending on its mass
Supernova -a star that expoldes
Black Hole-a star with so much gravity that nothing explodes
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| What is the outer most layer of the sun called? | The corona
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| What is the second layer of the sun is called? | The chromosphere
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| What is the third layer of the sun called? | Photosphere
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| Where does the sun's source of energy come from? | Its center
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