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Science Explosion 11
BJU 6th Science - Chapter 10
| Question | Answer |
|---|---|
| magnitude | the brightness of a star |
| apparent magnitude | how bright a star appears to us |
| absolute magnitude | true brightness of a star |
| dwarf | small and medium-sized stars |
| giant star | stars that are tens to hundreds of times larger than the Sun |
| super-giant | the largest and brightest stars |
| light-year | the distance that light travels in one year |
| parallax | the apparent movement or change in position of one star in relationship to other stars |
| variable star | star brightness changes |
| pulsating variable star | star swells and shrinks |
| eclipsing variable star | change in appearance of brightness as they orbit each other |
| nova | star that suddenly flares up temporarily becoming brighter |
| nebula | intercellular gasses and debris |
| supernova | death explosion of a star |
| neutron star | neutrons tightly packed to form small star |
| pulsar | a neutron star that spins rapidly on its axis |
| black hole | a super-giant that collapses and disappears from space |
| constellation | groups of stars that appear to form pictures and make stars easier to find |
| circumpolar constellation | circles around the pole daily |
| astrology | the belief that the stars control man’s destiny |
| astronomy | scientific study of celestial (of or in the universe) objects |
| refracting telescope | a telescope that uses only lenses to make objects appear larger |
| reflecting telescope | a telescope that uses lenses and mirrors to make objects appear larger |
| radio telescope | collects radio waves from space using a large concave-shaped disk |
| spectroscope | a device that breaks down light into all its colors; similar to a prism |
| red-shift | the color given by objects moving away from the Earth |
| binary system | a star group containing two stars that revolve around each other |
| multiple star group | a small star group of three or four stars |
| open star cluster | a group of several hundred to a few thousand stars with no particular arrangement |
| globular cluster | a group of several thousand to a million stars that are close to each other and arranged in the shape of a ball |
| galaxy | huge star system that contains millions, or even billions of stars and covers many light-years of space |
| Local Group | our Milky Way in a group of more than 30 other galaxies that travel though space together |
| asteroid | irregularly shaped pieces of rock, metal, and dust and are sometimes called minor planets |
| meteoroid | a chunk of metal or stone that is moving toward Earth’s atmosphere |
| meteor | a meteoroid that lights up because of friction as it moves through Earth’s atmosphere |
| meteorite | a meteor that does not burn up in Earth atmosphere and impacts Earth’s surface |
| comet | An icy chunk of frozen gases, water, and dust that continually orbits the Sun |
Created by:
MrsDunham
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