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Slide 2 8 th Grade Stars and Galaxies Review Slide 3 A:B: ConstellationNebula #1 An instrument that helps astronomers determine The composition of a star C:D: SpectroscopePhotosphere Slide 4 C. Spectroscope Slide 5 A:B: Absolute magnitudeAbsolute zero #2 The actual amount of light a star gives off. C:D: Light yearApparent magnitude Slide 6 A. Absolute magnitude Slide 7 A:B: nebulaconstellation #3 A gigantic system of stars, gas, dust, and planets Held together by gravity. C:D: galaxyspectroscope Slide 8 C. Galaxy Slide 9 A:B: constellationfusion #4 A huge cloud of gas and dust from which a star is born. C:D: nebulaspectroscope Slide 10 C. nebula Slide 11 A:B: fusionthe object is disappearing #5 A shift toward the red end of the spectrum indicates ______________. C:D: the object is getting closer the object is moving away Slide 12 C. The object is moving away Slide 13 A:B: It was once bigger than it is today It was once smaller than it is today #6 If a shift to the red end of the spectrum is seen in many stars, what can be inferred about the size of our universe? C:D: None of these All of the stars are red giants Slide 14 B. It was once smaller than it is today Slide 15 A:B: Light yearApparent magnitude #7 The distance light travels in one year. C:D: Astronomical unitAbsolute year Slide 16 A. Light year Slide 17 A:B: The distance from the sun to the closest star Apparent magnitude #8 Light years would be use to measure__________. C:D: The distance from the Earth to the Moon None of these Slide 18 A. the distance from the sun to the closest star Slide 19 A:B: PhotosphereSun Spot #9 Amount of stars light as observed from the earth. C:D: Absolute magnitudeApparent magnitude Slide 20 D. Apparent magnitude Slide 21 A:B: The star is burning outThe star is moving away from Earth C:D: The star is getting cooler Red shift #10 These patterns are part of a stars spectrum. Figure 1 shows the actual spectrum lines. Figure 2 shows the same lines as viewed from Earth. What can be inferred by the spectra in Figure 2 Figure 1 Figure 2 Slide 22 B. The star is moving away from Earth Slide 23 A:B: Black holeFusion #11 Most accepted theory for the origin of the universe. *This theory is supported by the red shift of light from stars and galaxies. C:D: GalaxyBig bang Slide 24 D. Big bang Slide 25 A:B: Black holeFusion #12 Theory that a gigantic explosion sent matter and energy expanding out into space. C:D: GalaxyBig bang Slide 26 D. Big bang Slide 27 A:B: Milky WaySnickers #13 The name of the galaxy we live in. C:D: SpectroscopeConstellation Slide 28 A. Milky Way Slide 29 A:B: Milky WaySnickers C:D: SpectroscopeConstellation #14 The name of the galaxy we live in. Slide 30 A. Milky Way Slide 31 A:B: B-C diagramH-R diagram C:D: M-R diagramH-P diagram #15 Diagram that shows the relationship between a stars temperature and its luminosity (brightness) Slide 32 B. H-R diagram Slide 33 A:B: regularirregular #16 The type of galaxy we live in. C:D: Main sequencespiral Slide 34 D. Spiral Slide 35 A:B: irregularbinary stars C:D: main sequencespiral #17 90% of the stars are in this category. Slide 36 C. Main Sequence Slide 37 A:B: H (hydrogen) He (helium) #18 Stars are mainly composed of _____________. C:D: C (carbon)O (oxygen) Slide 38 A.H (hydrogen) & B. He (helium) Slide 39 A:B: Of average absolute magnitude A yellow star #19 What of these describe\s our Sun? C:D: A main sequence starsAll of these Slide 40 D. All of these Slide 41 A:B: Red GiantMain Sequence #20 Our Sun is currently in which stage? C:D: Yellow GiantYellow Dwarf Slide 42 B. Main Sequence Slide 43 Great Job!!!! Great Job!!!! Thank you for playing! Thank you for playing!