Astronomy A100
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- What causes the phases of the moon?
- Combination of the moons orbit around the Earth with the fact that only the side facing the sun is lit
- How does the size and orbit of the moon compare to the size of the Earth.
- If the Earth were a basketball it 1ft wide the moon would be 3 in.
- What are the differences between the Highlands and the lunar Mare?
- Highlands are heavily cratered (4.5) billion yrs old and Lunar Mare are less cratered (4 billion yrs old)
- What path in the sky does the moon make and how does this effect eclipses?
- The moon's orbit is offset by 5 degrees from the ecliptic.
- What causes the tides on Earth?
- The moons gravitation tug
- What is the greenhouse effect
- Sunlight is absorbed by the earth, the earth emits IR light which is absorbed byt the atmosphere then re-emitted in the IR. The absorbers of IR energy are greenhouse gases
- How has our atmosphere changed over the past 100 years, and over the geological history of the earth?
- Increases in CO2 levels.
- What are the consequences of changing the makeup of our atmosphere in the near future?
- Melting ice caps...Greenland and Antartic could add 40 M to ocean levels
- How does the Ozone layer affect our atmosphere?
- Filters out harmful UV rays
- What does the appearance of Mercury tell us about Mercury?
- It is old and no atmosphere.
- What is the density of Merury like, what does that tell us about Mercury?
- Impacted by large object and the result impact removed most of it's mantle. Only could obtain dense materials during formation
- What is the atmosphere of Mercury like?
- No atmosphere
- What do the craters on Venus tell us about Venus?
- Young surface
- Why is the urface of Venus so young?
- giant impact melted surface
- What is the surface temperature of Venus like and why?
- Extremely hot, over 30 layers of atmosphere
- What is the atmosphere of Venus like?
- 96.5% Carbon Dioxide, very dry
- Where is the water on Venus, and where did it go?
- Acid Rain clouds (40-70Km in atmosphere)
- How does the atmosphere of Venus compare to Earth's atmosphere?
- Same size and composition
- What is the atmosphere of Mars like?
- 95% Carbon Dioxide (1/100 of Earth's)
- What is the temperature of the surface of Mars and why?
- Frozen, hardly any greenhouse effect
- What is the evidence for liquid water on the surface of Mars.
- None, but it maybe unterneath the surface
- Why is there no Liguid water on Mars today?
- to cold