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Description
Flashcards by Malachy Moran-Tun, updated more than 1 year ago
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Created by Malachy Moran-Tun
over 3 years ago
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| Question | Answer |
| Order of the Planets | Mercury Venus Earth Mars Jupiter Saturn Uranus ( ͡° ͜ʖ ͡°) Neptune |
| What is the Difference between Comets and Asteroids | Comets are lumps of Ice and Dust that orbit the Sun Asteroids are lumps of Rock and Metals, usually found in the Asteroid Belt (wow really?) |
| What is the Geocentric Model of the Solar System? | Model where the Sun, Moon and Planets Orbited the Earth in Perfect Circles |
| What is the Heliocentric Model of the Solar System? | Model made by my man Galileo (Figaro). Earth Orbits the Sun, and smaller Moons Orbit Planets (such as THE Moon) Orbits are still Perfect Circles |
| What has Changed for the Current Model from the Heliocentric Model? | Orbits are Elliptical, not Circular |
| What does Gravity Provide for Planets? | The (Centripetal) Force that Creates Orbits |
| The ______ due to Gravity Depends on ______ and ______ | The Force due to Gravity Depends on Mass and Distance |
| What are the Stages of the Life Cycle of Stars? | Nebula Protostar Main Sequence Star Red Supergiant | Red Giant Supernova | White Dwarf Neutron Star| or Black Hole | (more info and diagrams in revision guide) |
| What is Red Shift? | A form of the Doppler Effect where the Wavelength of a Wave (in this instance, Light) Change due to the Movement of the Emitter. |
| Doppler Effect Image | |
| True / False More Distant Galaxies have Smaller Red-Shifts? | False They show a Bigger Observed Increase in Wavelength |
| How does Red Shift prove the Expansion of the Universe? | Since the Wavelength has a Bigger Observed Increase, all Distant Galaxies are Moving Away Faster, therefore the Universe is Expanding |
| What is the Steady State Theory? | > Universe has Always Existed > Universe appears the Same Everywhere > As it Expands, New Matter is Constantly being Created > Density of the Universe is the Same > No Beginning or End |
| What is the Big Bang Theory? | > An American Sitcom with Only One Joke or > All Matter in the Universe initially occupied a Very Small Space > It was Dense and approx. a KJGHPILLION degrees (Kelvin obviously) > It then Exploded and started Expanding > There is a Finite Age for the Universe |
| How is Cosmic Microwave Background Radiation Evidence for the Big Bang? | The Radiation suggests the Universe was once much Hotter and Denser, so it must have had an initial beginning. |
| How can you Improve the Quality of an (Optical) Telescope? | Increase the Aperture - lets more light in Use a Higher Quality Lens |
| Why are Space Telescopes better than ones on Earth? | There is no Light Pollution, Air Pollution or Atmosphere to get in the way |
| What is this? | A radio telescope |
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