| A | B |
|---|
| How old is the universe? | 13.7 billion years old |
| The universe began with an event called the | big bang |
| Name one of the first atoms that was created in the universe | hydrogen- or - helium |
| What has happened to the universe since the big bang? | everything has expanded |
| Since the big bang, the universe has been constantly expanding and? (heating up or cooling??) | cooling |
| Is there a center of the universe? | no |
| With respect to one another, all galaxies are moving how? | moving father apart |
| A longer wavelength has its waves | farther apart |
| The human eye sees different wavelengths of visible light as | colors |
| Using the visible light spectrum in your ESRT, which color has the longest wavelength? | red |
| Using the visible light spectrum in your ERST, which color has a longer wavelength : green or violet? | green |
| Using the electromagnetic spectrum in youe ESRT, which has a shorter wavelength: radio waves or X Rays? | x Rays |
| Shorter wavelengths = (high or low) energy? | high |
| Long wavelengths = (high or low) energy? | low |
| When a star is moving towards us, its wavelength gets | shorter |
| When a star is moving away from us, its wavelength gets | longer |
| When a star is moving away from us, its wavelength shifts toward the _____ end of the spectrum. | red |
| When a star is moving towards us, its wavelength shifts toward the ______ end of the spectrum | blue |
| The big Bang Theory is most directly supported by | a red shift of light from different galaxies |
| How are galaxies classified? | by their shape |
| Names some types of galaxies | spiral, elliptical, irregular |
| Galactic shape depends on | speed of rotation |
| Which type of galaxy is spinning the fastest? | spiral |
| What is the name of our galaxy? | Milky Way Galaxy |
| What type of galaxy is the Milky Way? | spiral |
| An average galaxy will generally have _________ of stars? | billions |
| Stars produce energy through a process called | nuclear fusion |
| Nuclear Fusion occurs in the ________ of a star? | core |
| In order for nuclear fusion to take place, very high ______ and ______ must exist | temperature & pressure |
| What does luminosity mean? | brightness of a star |
| (ESRT) What is the luminosity of the Sun? | 1 |
| (ESRT) What star has a hotter surface temperature: Spica or Polaris? | Spica |
| (ESRT) What type of star is Alpha Centauri? | Main Sequence |
| (ESRT) What color is the star named Procyon B? | White |
| (ESRT) Do most White Dwarfs have high or low luminosity? | low |
| What is a nebula? | Star forming cloud made of dust and gas |
| Will a small star ever explode into a Supernova? | no |
| (ESRT) Fill in the blank: Nebula - ________ - Red Giant - White Dwarf - Black Dwarf | Main Sequence |
| (ESRT) Fill in the blank: Nebula - Main Sequence - Super giant - Supernova - _________ | Neutron Star |
| Name the Terrestial Panets: | Mercury, Venus, Earth, Mars |
| Name the Jovian Planets: | Jupiter, Saturn, Uranus, Neptune |
| What is the difference between a meteor and a meteorite? | Meteor - in earth's atmosphere; meteorite - on earth's surface |
| Besides planets, what else can moons orbit? | asteroids |
| The universe is made up of? | space, matter, energy |
| The Terrestial planets are ________ to the Sun, are mostly _____ and have a ______ density | closest, solid, high |
| The jovian planets are ____________ from the Sun and are very ______ in size | far away, large |
| Jovian planets are mostly ________, but have a solid core and are ______ in density | gaseous, low |
| Planets have a __________ shape | spherical |
| This object has a solid rocky or metallic body, independently orbits the Sun and does not have an atmoosphere | asteroid |
| This object is mostly made of solid ice covered in small pieces of rocky and or metallic solids | comets |
| This object orbits a planet or asteroid | moon |
| System that refers to any star or group of stars that have non-stars orbiting around it | solar system |
| Our sun is the ___________ center of our Sloar System. | gravitational |
| our Sun is a medium-sized __________________ star about __________ years old. | main sequence; 5 billion |
