Astronomy 121 Study guides, Class notes & Summaries

-- Life, orbital resonances, rings and gaps. - ️️Give three examples of current properties of the solar system that a model of its formation need not explain. Why? 11. How did the temperature structure of the solar nebula affect the planetary composition? - ️️-- The distance between a planet and the sun determines the temperatures at which each planet was created. For planets close to the Sun like Mercury and Venus, the temperature was too high for those planets to be formed with light ...

14) Describe four ways in which earth is unique among the terrestrial worlds, and how each is important to life. - ️️Surface liquid water Atmospheric oxygen Plate tectonics Climate stabilty 3 key processes that led the solar system to form spinning disk - ️️Heating, Spinning, Flattening 4 categories of materials in the solar nebula by their condensation properties and abundance - ️️Hydrogen/Helium - 98% Hydrogen Compounds - 1.4% Rock - .4% Metals - .2% Based on figure 7.48, ...

A rock suddenly moving without any external forces (earthquakes, someone throwing it, poltergeists, etc) would be a violation of which law? a. Kepler's 3rd law b. Kepler's 2nd law c. Newton's 2nd law d. Kepler's 1st law e. Newton's 1st law f. Newton's 3rd law - ️️e. Newton's 1st law According to chapter 3, if the Earth suddenly collapsed and shrank to half its size then... (multiple) a. The spin would decrease b. it would turn into a black hole c. The density would incre...

A feature of the Jovian planets is that _________. - ️️They are composed primarily of hydrogen Analemma - ️️The figure-8 path traced by the Sun over the course of a year when viewed at the same place and the same time each day. Represents discrepancies between apparent and mean solar time. Annual Trigonometric Parallax - ️️ Annular Eclipse - ️️Solar eclipse during which the Moon is directly in front of the Sun but its angular size is not large enough to fully block the Sun Ar...

A major reason for the large size of the volcanoes on Mars is the probable lack of ____________ on Mars - ️️Continental drift A measurement of the density of a planet can tell its rough _________. - ️️Composition A strong magnetic field indicates that the planet has __________, _______, and ________. - ️️A large liquid core, a core rich in metals, and a high rotation rate. Accretional Heating - ️️As the planets formed through the accretion of planetesimals, they heated due to ...

4 components of the Earth's Interior - ️️1. Thin crust 2. Semi-solid mantle 3. Liquid outer core 4. Solid inner core 4 types of boundaries between plates - ️️1. mid-ocean ridge 2. sliding plates 3. ocean trench 4. mountains 5 components of atmosphere (closest-farthest) - ️️1. Troposphere 2. Stratosphere 3. Mesosphere 4. Thermosphere 5. Exosphere 7 Stages of the Earth's atmosphere - ️️1. Proto-atmosphere 2. Early atmosphere 3. Secondary atmosphere 4. Cooling pha...

True or false, asteroids never have moons - ️️False Most meteors are stopped by the atmosphere at heights of - ️️10 to 100 km What are Kirkwood gaps caused by? - ️️The gravity of Jupiter What causes Oort cloud comets to enter the inner solar system? - ️️Their orbits are altered by the gravity of passing star Why does the plasma tail of a comet point away from the Sun? - ️️The solar wind pushes the ionized gas Most asteroids are located in the asteroid belt that lies betw...

PHSC 121 Homework (1-4) 1st Exam Practice Questions With Correct Answers 2024. Astronomy is the study of ___________________. a. the Solar System b. galaxies c. the entire universe d. the planets of the Solar System - CORRECT ANSWER c. the entire universe Which of the following is not a step in the scientific method? a. evaluate science opinion b. refine hypothesis, develop theory c. evaluate data d. draw new conclusions from experimental data and observations - CORRECT ANSWE...

PHSC 121 FINAL EXAM QUESTIONS AND ANSWERS GRADED A+ Which ancient culture/country not only kept detailed astronomical records, but also seems to have recorded the story of creation and early man in its very language? - Answer-China Which of these reasons describes why astronomy has been practiced throughout history? - Answer-to understand major world events, to understand weather/climate What is the universe? - Answer-Everything physical that existed Given the size of the univers...

PHSC-121 Astronomy Quiz 1 With Complete Solution 2024. Why is there astronomy? - CORRECT ANSWER People look for patterns in order to understand the world. scientific notation - CORRECT ANSWER a method of expressing a quantity as a number multiplied by 10 to the appropriate power What is the universe? - CORRECT ANSWER All that is Multiverse - CORRECT ANSWER The set of parallel universes that may exist, with our observable universe as only one part. Lagrange points - CORRECT ANSWE...