McC 8 Astronomy Ch 24
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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| white dwarf | small, hot star consisting of a hot dense core contracting under the force of gravity
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| absolute magnitutde | actual amount of light a star gives off
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| apparent magnitude | amount of a star's light observed on Earth
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| parallax | apparent shift in position of an object when viewed from different places: used to determine distances
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| constellations | groups of stars whose positions in the sky seem to change as Earth moves
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| main sequence | classification of about 90 percent of the stars
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| nebula | earliest stage of a star's formation
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| giant | large, cool expanding star in which helium fuses to form carbon
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| light-year | distance light travels in a year (9.5 trillion km)
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| supergiant | relatively cool star that has expanded to more than 700 times as large as our sun
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| neutron star | star in which only neutrons can exist in its core
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| black hole | object so dense that nothing, including light, can escape it
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| supernova | produced from an explosion that occurs when a star's core collapses
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| binary star system | two stars revolving around one another
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| galaxy | large group of stars, gas, and dust held together by gravity
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| Big Bang Theory | explanation for the beginning of the universe
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| Why do stars shine? | energy produced by fusion
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| Friedmann Theory | universe began with a big bang followed by a big crunch
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| Steady-State Theory | universe is the same and never changes
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| Oscillating Theory | never-ending cycle of bangs and crunches
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| What determines how long a star lives? | the starting mass
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| Spiral Galaxy | dense central region surronded by arms; arms have young, stars, gas and dust; nucleus has older stars less gas and dust
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| Barred Spiral Galaxy | similar to Spiral Galaxy but arms have a pronounced bar portion coming from the nucleus
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| Elliptical Galaxy | round to discus shaped (football); old stars with little or no gas & dust
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| Irregular Galaxy | patchy sprawling collection of young stars with gas & dust
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| Name & Type of our Galaxy | Milky Way & Barred Spiral Galaxy
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| How are stars classified? | size, brightness and temperature
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| Colors of Stars from hottest to coolest | Blue, White, Yellow, Orange, Red
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| Brightness of a star depends on | size and temperature
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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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.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
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:
MCJH
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