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