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Planets Final #3
Test 3 Questions
| Question | Answer |
|---|---|
| Gaps in Saturn's rings are caused by: | gravitational interactions with small moons |
| Sea level change is: | accelerating |
| What tears a body apart when it is within Roche limit of a planet? | tidal force |
| What is the source of Io's volcanic activity? | tidal heating |
| Sea leve changes wil have its greatest impact on costal areas that are: | passive continental margins like the eastern US and southern India |
| Name a moon that might be a good place to look for life and why: | Enceladus; liquid water under thin crust as seen by geysers |
| Where is the solid part of the gas giants? | in small cores |
| How do aerosols influence climate? | absorb radiation, increase albedo, reflect solar radiation, produce acid rain |
| Which of the gas giants have strong magnetic fields? | all of them |
| Which planet has the greatest tilt of its rotational axis? | uranus |
| If sea ice melts, this would affect the climate by: | increasing the amount of solar energy absorbed at the surface |
| Which of the following provides evidence that water once flowed on Mars? | runoff and outflow channels |
| How does the northern hemisphere of Mars differ from the southern hemisphere? | North has fewer craters, more volcanoes, lower elevation, and more subsurface ice |
| Which of the following substances contributes the most to global temperature change? | carbon dioxide |
| One of the unusual things about Jupiter's moon Io is that it: | is the most volcanically active object in the solar system |
| A planet or moon is most likely to have an atmosphere if it has a: | high mass and low temperature |
| Which factor would be responsible for two cities that are geographically close to have contrasting climats? | elevation |
| What is the temperature on Mercury like? | some places very cold, some places very warm |
| Kepler's third law | (objects subreal period)^2=(distance from the sun)^3 |
| Why is the marine west coast climate so narrow in places like North and South America yet rather extensive in Western Europe? | North and South America have coastal mountain ranges blocking inward movement of maritime air |
| What did the Huygens and Cassini probes find on the surface of Titan? | methane lakes |
| Polar regions receive nearly continuous sunlight in the summer months so why doesn't the mean temperature during those months get above 10C? | The sun is too low in the sky to be an effective heat source |
| The rate of cratering in the solar system: | shows that most interplanetary debris was swept up soon after the formation of the solar system |
| A dry climate is defined as: | one where the evaporation exceeds the precipitation |
| Why is Venus so much hotter than Earth? | a runaway greenhouse effect |
| Who completed the most successful geocentric model for the solar system? | Ptolemy |
| why do humid tropical regions have only small variations in temperature throughout the year? | The location of this region is limited to areas where the solar radiation will not vary significantly |
| Why don't we get eclipses every month? | The Moon's orbit is tilted relative to the ecliptic |
| Which are most like the particles found in Saturn's rings? | fist-sized snowballs |
| Which of the following is a part of the earth system that could be significantly impacted by climate change? | deposition of sedimentary rocks |
| The ecliptic is: | the apparent path of the Sun through the sky |
| Are the jovian planets more like the ____________ than the _______________. | Sun; terrestrial planets |
| Kepler's model for the solar system was the first to: | use elliptical orbits |
| If Earth were tilted less, then during winter at your location you would: | experience warmer temperatures |
| Where will the Sun be at sunset during the middle of winter? | near the horizon, south of west |
| The azimuth and altitude of an object located due south on the horizon are: | azimuth 180 degrees, altitude 0 degrees |
| If you could observe from Mercury, which planets would undergo retrograde motion? | all of them |
| Why don't we get eclipses every month? | The moon's orbit is tilted relative to the ecliptic |
| As you watch the stars one evening, you notice that they rise exactly to the east and set exactly to the west, making circles perpendicular to the horizon. Where are you? | at the equator |
| If the Earth rotated twice as fast as it currently does, but its motion around the sun stayed the same, then: | the night would be half as long |
| Why isn't the Earth covered in impact craters like the Moon is? | Erosion and geologic activity has made them unnoticeable. |
| What are the two main components of the atmospheres of the gas giants? | helium and hydrogen |
| Other than water and life, what is one feature of Earth's geology that is unique to Earth? | plate tectonics and composite volcanoes |
| What is an epicycle supposed to explain? | retrograde motion of the planets |
| What is the leading theory for the formation of the moon? | impact theory |
| What is true about the Moon's orbital and rotational periods? | they are equal |
| What will occur when the new moon is on the ecliptic? | a total solar eclipse |
| What is true about solar system densities? | the denser planets lie closer to the sun |
| If the sun rises directly east on the Autumnal equinox, then three weeks later it will rise: | south of east |
| How often is the sun at the zenith for an observer on the equator? | twice per year |
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