AstroExam2天文.docx

Lesson4Describe the difference between low and high levels of learning, and give examples of what kinds of activities characterize low and high levels.Classify a homework or exam question according to the required level of learning.UnderstandandapplyAssess your own study habits according to the level of learning you are working at, and assess what level is required for different classes or scenarios in your life.Define an Astronomical Unit (AU).For general reference, we can say that one astronomical unit (AU) represents the mean distance between the Earth and our sun. The AU is approximately 150 million kilometers or 93 million miles. It is approximately 8 light-minutes.Name all 8 planets in order.Mercury, Venus, Earth, Mars.Jupiter, Saturn, Uranus 天王星extreme seasons, Neptune.海王星Compare and contrast the major characteristics of terrestrial vs. jovian planets.Identify all 4 terrestrials and all 4 jovian planets.Terrestrial planets: Earth, Venus, Mercury, MarsJovian planets: Jupiter, Saturn, Uranus, NeptuneExplain the differences and similarities between the greenhouse effect and global warming.Global warming is an INCREASING greenhouse effect due to changing composition of the atmosphere. The natural greenhouse effect is normal on Earth, and stable. But ours is now increasing. This non-natural, increasing greenhouse effect leads to global warming, and that IS bad for ecosystems on Earth.Define asteroid belt and Kuiper belt, know their locations, and compare and contrast their properties.The Kuiper Belt (pronounced KEYE-puhr) is a belt of thousands or millions of individual rocky, icy bodies very far out, near Plutos orbit: 30-100 AU. Pluto, Eris, Haumea, Makemake, and any other future-discovered objects orbiting our Sun and large enough to pull themselves into a spherical shape (but not full-fledged planets) are now dubbed dwarf planets. Asteroids are small iron and rocky bodies; most orbit the Sun between Mars and Jupiter. Define comets and meteors; Describe several