| A | B |
|---|
| all of ___, ___, & ___ were compressed into something smaller than an atom before the big bang. | time space and matter |
| after the big bang, all of this ___ and ____ were released, forming the _____, _____, ____ and other celestial objects. | energy, matter, galazies, stars, planets |
| how many years ago did the big band occur? | 13-14 billion years ago |
| when did galaxies form? | 10 billion years ago |
| when did our solar system form? | 4.6 billion years ago. |
| what is evidence of the big bang? | red shifts |
| there is evidence that the universe is still ____. | expanding. |
| when are colors produced? | when light is separated into different wavelengths |
| each element has its own ____. | unique set of lines. |
| why are most galaxies red shifting? | bc the universe is expanding. |
| when is it possible to identify the presence of an element? | when all of its lines are present in a spectrum. |
| red shift | light waves moving away from earth become longer/expand- longer wavelength |
| blue shift | light waves moving toward earth will be squeezed/compressed- have a shorter wavelenght. |
| hubbles law | galaxies that are further away are mving faster than galaxies that are close to us bc of less gravitational pull. |
| galaxies that are futer away have a greater ___ shift than galaxies that are closer. | red |
| what is a light year? | the distance light travels in one year. |
| relationship between size of an object and gravitational pull | bigger mass, bigger pull |
| relationship between distance of an object and gravitational pull | closer, bigger pull |
| terrestrial planet | close to the sun and mostly solid. small diameter and high denisity. few moons no rings. |
| jovian planet | far from sun and gaseous. many moons large diameters and low densities. no solid surfaces. have rings. |
| which planets are terrestrial | mercury venus earth mars |
| which planets are jovian? | uranus jupiter saturn neptune |
| heliocentric | sun at center of milky way |
| geocentric | earth at center of milky way |
| the ___ the temperature of a star the ____ the luminosity | higher, higher |
| apparent brightness | the brightness that you see |
| absolute brightness | the actual brightness |
| spectrascope | An instrument for producing and observing spectra |
| satellite | an object that orbits another |
| solid rocky and or metallic body that indepently orbits the sun | asteroid |
| ices of substances such as water and methane mixed with rocky or metallic solids | comet |
| meteroid | very small fragments that orbit the sun. |
| why does mars have craters? | it has a thin atmosphere so less things burn up in in and wind up hitting the planet and leaving raters |
| why does venus retain more heat than earth? | high carbon dioxide |
| fuel of our sun | helium and hydrogen |
