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Star Unit Test
| Question | Answer |
|---|---|
| How many constellations are there? | 88 |
| What is a circulation constellation? | A constellation seen all year, that appears to move around North Pole |
| What is an example of a circulation constellation? | The Big Dipper |
| What is a seasonal constellation? | A constellation seen only during certain seasons because of earths changing position in its orbit around the sun |
| What is an example of a seasonal constellation? | Orion |
| What is an open star cluster? | A huge group of stars found in the center of the galaxy |
| What is a globular star cluster? | A spherical collection of stars found in the halo |
| What is a binary star? | A group of two stars bound together by gravity |
| What is an eclipsing binary star? | When two stars eclipse each other |
| What is a light year? | The distance light travels in a year- 9.5 trillion km |
| What is parallax? | The apparent shift in position of the stars or objects caused by change in position |
| What is magnitude? | Brightness |
| What is apparent magnitude? | How bright a star appears to be |
| What is absolute magnitude? | The true light given off by a star |
| What is luminosity? | The energy output of a star |
| How do you classify a spectra? | By the composition, pressure, etc. |
| What is a bright line/emission spectra? | It is unevenly spaced series of different colors and brightness |
| What is a dark line/emission spectra? | A continuous spectra with dark lines where light is absorbed |
| What is a continuous spectra? | Unbroken band of colors and glowing gas |
| What is a spectroscope? | An instrument that uses and prism or diffraction grating to separate light and study star light |
| What is the Doppler effect? | It is the change in frequency of light or sound when the course of the wave is moving |
| What happens during a red shift? | The distance from earth is increasing, moving farther from earth |
| What happens during a blue shift? | The distance from earth is decreasing, moving towards earth |
| What happens during no shift? | The distance doesn't change |
| What is the Hetrzsprung diagram? | A continuous band extending from the upper right (hot bright stars) tot eh lower right (cool dim stars) |
| What is a protostar? | A large mass formed by a gas giant |
| What is the main sequence? | A group of stars that form a diagonal line on HR diagram |
| Are we in the main sequence? | Yes |
| How many stars in percentage are in the main sequence? | 90% |
| What is a black dwarf? | A white dwarf that is cooled down and no longer emits energy |
| Are any stars a black dwarf? | No |
| What is a white dwarf? | A small old star with low luminosity and high temperature |
| What is a super nova? | A massive exploding star |
| What is a red giant? | A large, very bright, cool star that will be our next sun |
| What is a pulsar? | A neutron star that sends out radio waves that is rapidly spinning |
| What is a neutron star? | It is made from massive stars that is extremely dense |
| What is a black hole? | An object in space who is so strong that nothing cannot escape it(densest object in universe) |
| How old is the universe? | It's 13.8 billion years old |
| What is in the star composition? | Hydrogen and Helium but mostly helium |
| What are the star temperatures? | Red=Cool Blue=Hot |
| What is a spiral galaxy? | Consists of a flat rotating disk with pinwheel arms ex: Milky Way |
| What is an elliptical galaxy? | A smooth ball shaped appearance |
| What is an irregular galaxy? | No definite shape contains old stars with dust and gas |
| What is an quasar galaxy? | It is very bright, extremely distant |
| What is the steady state theory? | It proposes that the universe looks the same on large scales to all observers and always looked that way |
| What is the big bang hypothesis? | It states that the universe began as a point and has been expanding ever since |
| What is the evidence for the big bang hypothesis? | The evidence is the red shift and radiation |
| Why is star mass important? | It determines that more mass = more dense = bigger diameter = hotter temperature |
| What is the life cycle of an average star? | 1)Nebula 2)Main Sequence 3)Red Giant 4)White Dwarf 5)Black Dwarf 6)Super Nova 7)Neutron Star 8)Black Hole |
Created by:
KJohnson23
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