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Stars 6th grade
The life cycle of stars and vocabulary. Mrs.McDermott's 2nd period science class
| Question | Answer |
|---|---|
| What is a cloud of dust and gas in space? | Nebula |
| What begins to form out of a nebula? | Protostar |
| What kind of star fuses hydrogen into helium. Often called the adult form of the star? | Main-sequence star |
| 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 |
| What happens when a star uses up the supply of hydrogen and expands? | It becomes a red giant |
| When a stars core continues to shrink and the surface heats up, what is this new kind of star called? | White dwarf |
| What is it called when a white dwarf cools off? | A black dwarf |
| These have masses of 10 or more times the sun and luminosities from 30,000 to over a million times our sun. | Super giants |
| What is it called when a star has so much gravity that nothing can escape? | Black hole |
| What is the name of the star who is extremely small and dense,and is completely composed of neutrons? | Neutron star |
| What is an explosion that rips apart a star at the end of its life? | Supernova |
| What is a hot ball of gas held together by its own gravity? | Star |
| What is a number of stars that appear to form a pattern? | Constellation |
| What is the brightness of a star? | Magnitude |
| What is absolute magnitude? | The actual brightness of a star |
| What is apparent magnitude? | How bright a star looks from Earth |
| What is the apparent shift of an object's location when viewed from different places called? | Parallax |
| What is a light year? | The distance light travels in one year-9 trillion kilometers |
| A star's color is related to its_______ | Temperature |
| The coolest stars are________ | Red and orange |
| Warmer stars are________ | Yellow |
| The hottest stars are________ | Blue and white |
| Nuclear reactions within the star create______ | The light we see from the star |
| The star's high temperature cause it to_________ | Expand |
| Gravity causes the star to _______ at the same time as it's expanding | Contract |
| The H-R diagram compares what two elements of stars? | Temperature and absolute magnitude |
| Star begins its life in what stage? | Nebula |
| What does a star become after a nebula? | A Protostar |
| What happens when the center of a protostar reaches several million degrees? | It becomes a main-sequence star |
| What does a main-seqence star do? | Fuses hydrogen into helium |
| 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 |
| 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 |
| 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 |
| What is the outer most layer of the sun called? | The corona |
| What is the second layer of the sun is called? | The chromosphere |
| What is the third layer of the sun called? | Photosphere |
| Where does the sun's source of energy come from? | Its center |
Created by:
Siobhanloos79
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