Astronomy
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Created by:
racheleverman on May 9, 2011
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68 terms
Terms | Definitions |
|---|---|
 Who was the first person to step onto the Moon? | Neil Armstrong |
| What compound once thought to be totally absent in Moon rocks was recently found on the moon? | Water |
| Lunar basalts are found primarily in the... | In the Maria |
| Anorthosites are found mostly in the... | Highlands |
| What instruments did the astronauts leave on the Moon that have been used to study the Moon's interior structure? | sizemometors |
| Most of the Lunar Maria are found... | On the side of the moon that faces us. |
| Astronomers beliebe the age of the Moon to be approximately... | 4.5 billion years |
| During the first 200 million years of the Moon's history... | The surface was molten. |
| From 4.2 to 3.9 billion years ago on the Moon... | Highlands form |
| From 3.8 to 3.1 billion years ago from the Moon... | Maria form |
| From 3.1 billion years ago on the Moon | Few if any major surface features were formed |
| The theory of the Moon's origin many astronomers currently favor this theory. | The Collision Theory |
| If you see a bright "star" in the sky how could you tell whether it is a star and not a planet? | If it moves its position relative to the other stars. |
| Consider the Statement: There is no gravity in space. This statement is.. | False |
| What is one piece of evidence that suggests to many astronomers that the Universe is expanding? | Red shift in distant clusters of galaxies |
| Where do stars form? | Nebulae |
| Once the process was started, what was the primary physical force responsible for the formation of the solar system? | Gravity |
| Astronomers believe the Sun produces its energy by what process? | Nuclear Fusion, Hydrogen--Helium |
| What formed most of the craters we see on many celestial bodies? | impact origin |
| Bode's Rule is a numerical relationship that led to the discovery of? | The 1st astroid names ceres. |
| Where do we find most asteroids in our Solar System? | Between Mars and Jupiter. |
| Why is the the temperature warmer in the summer, and cooler in the winter? | Because the sun's rays are more direct because of the tilt, stays out longer because of the tilt as well. Less daylight hours, rays more spread out. |
| What planet has the most moons? | Jupiter |
| What planet has a giant hurricane or the red spot? | Jupiter |
| Which planet's atmosphere is made of sulfuric acid? | Venus |
| Which planets are made of rock, metal, and are closer to the sun? | Terrestrial Planets |
| Which planets have most moons, hydrogen and it's compounds, and have rings? | Jovian Planets |
| What are the major gaseous substances that make up the Jovian planets? | Hydrogen and its compounds, some helium |
| What are the dwarf planets? | Ceres, Pluto, Machi Machi, others. |
| What are the current Plutoids? | Pluto, Machi Machi, and others. NOT Ceres |
| Why is ceres not a plutoid? | Because it doesnt orbit outside of neptune's orbit. |
| Why does the Moon have almost no atmosphere? | It doesnt have enough gravity. |
| What is a meteor? | An optical phenomenon. |
| What is a meteorite? | Hits the ground. |
| What is a meteoroid? | Orbits around the sun but doesnt hit. |
| Why is the surface of Venus so hot? | The atmosphere is carbon dioxide and traps in heat. |
| What is the largest known asteroid, now also classified as a dwarf planet? | Ceres |
| Why is Ceres not irregular in shape like many smaller asteroids? | Because its big enough to have its own gravitational pull. |
| What is a meteor heated by? | Atmospheric friction. |
| How does a comet nucleus look? | Only solid frozen chemicals, rock and metal. |
| When the Earth crosses the orbit of a comet we may experience? | Meteor Showers |
| Most commets are believed to orbit in a vast spherical region surrounding the solar system known as? | Orke cloud, 50,000 AU |
| What forces are responsible for the formation of a comet's tails? | Solar winds and sunlight propel it forward. |
| What evidence is there that the earth has been hit by asteroids or comets? | Craters |
| What was the Tunguska Event? | Meteorite in Russia busted in air destroyed forrest. |
| What is an Exoplanet? | A planet orbitting a star other than the sun. |
| Most meteorites were probably once part of what? | Astroids |
| What type of meteorite is most common? | Irons and stones |
| What type of meteorite is least common? | Stony Irons |
| Why does an asteroid or comet passing close to Earth pose of potential hazard? | They have a lot of kinetic energy, could hit earth. |
| What are Saturn's rings composed of? | Dust and debris, water and ice |
| What discovery led Walter and Luis Alvarez to theorize that an asteroid may have killed off most of the dinosaurs? | A 1 inch space of rock that contains more than 30 times more iridium than the surroundings layers. KT Boundary |
| Did all of the dinosaurs become extinct? | Nope birds |
| The now famous "mars meteorite" ALH84001 may contain? | Tiny microstructures of bacteria fossils. |
| What is the significance of the Miller-Urey experiments? | Early 1950's , proved it was easy to create amino acids in the lab. |
| What are some of the characteristics that distinguish living organisms from non-living matter? | Ability to reproduce, Metabolism, growth, response to a stimulus. |
| As far as we have been able to determine all known forms of life require this in order to exist? | Water |
| There have been reports of alleged UFOs for how long? | Throughout recorded history. |
| Why are alleged UFO photographs not considered hard evidence of alien visitations? | They can be tampered with. |
| What are Hyneks 6 types of UFO encounters? | Natural light, Daylight disk, radar visual, close encounters of 1st, 2nd, and 3rd time |
| If representatives from an extraterrestrial civilization were to visit earth how would their level of technology most likely compare with ours? | Much more advanced. |
| How do many astronomers believe that we might be able to detect an alien civilization? | Probable, but not any proof. |
| How many UFOs turn out to be true unknowns that remain unexplained? | 1%-10% |
| What historical account have we studied that is a good example of the Scientific Method in action? | Development of the concept of the solar system. |
| What type of statements cannot be tested for correctness using the Scientific Method? | Opinions |
| What does the famous physicist Dr. Stephen Hawkin think about contact with possible alien civilzations? | Not a good idea. |
| Which planet has a moon shaped roughly like a flying saucer? | Saturn- Atlas |
| Which moon shows evidence of rainfall and erosion by some liquid substance? | Titan, Saturn |
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