Introduction To Astronomy 101 Final Exam Questions With Correct Answers For Perfect Revisions.

Introduction To Astronomy 101 Final Exam Questions With Correct Answers For Perfect Revisions. If the radius of an object's orbit is halved, and angular momentum is conserved, what must happen to the object's speed? - correct answers.It must be doubled. Unlike the giant planets, the terrestrial planets formed when - correct inner Solar System was hotter than the outer Solar System The terrestrial planets and the giant planets have different compositions because - correct terrestrial planets formed closer to the Sun. The spectroscopic radial velocity method preferentially detects - correct planets close to the central star. The concept of disk instability was developed to solve the problem that - correct early solar nebula probably dispersed too soon to form Jupiter. Because angular momentum is conserved, an ice-skater who throws her arms out will - correct e more slowly. Clumps grow into planetesimals by - correct ding with other clumps The transit method preferentially detects - correct planets close to the central star If the radius of a spherical object is halved, what must happen to the period so that the spin angular momentum is conserved? - correct answers.It must be divided by 4. The amount of angular momentum in a spherical object does not depend on - correct temperature. The planets in the inner part of the Solar System are made primarily of refractory materials; the planets in the outer Solar System are made primarily of volatiles. That difference occurs because - correct volatiles were in the inner part of the accretion disk. If scientists want to and out about the composition of the early Solar System, the best objects to study are - correct oids and comets. The direction of revolution in the plane of the Solar System was determined by - correct direction of rotation of the original cloud. A planet in the "habitable zone" - correct at a distance where liquid water can exist on the surface. What is the formula for the Conservation of Angular Momentum? - correct answers.L=mvr What is believed to be the original shape/form of our solar system? - correct answers.A cloud of gas What is the first step in the formation fo the solar system? - correct answers.1. Cloud of gas; force of gravity pulls from all directions toward the center of mass. What is the second step in the formation of the solar system? - correct answers.2. Rotation slows collapse perpendicular to the axis of rotation. What is the third step in the formation of the solar system? - correct answers.Accretion disk forms around the protostar Accretion Disk - correct around protostar- has the most angular momentum Why does our Sun rotate "slowly"? - correct angular momentum from the collapsing cloud of dust and gas does not make it beyond the accretion disk to protostellar (very young) sun Stages of planetary formation from dust to planetesimal. - correct answers.Dust (in the accretion disk) Pebbles (dust knocked around into bigger pieces) Rocks (Pebbles combine by bumping into one another) Planetesimals (a growing planetesimal's gravity attracts more materials) Planetesimals - correct "tiny" planets -can gravitationally accrete (attract) material Cratering is a record of what - correct tesimal collisions Where can cratering be seen - correct answers.Mercury, Earth's moon, and craters on Earth Gas Planet Theories - correct answers.Accretion Model Gas-collapse Model What types of materials can you find throughout the solar system? - correct ctory materials (rocks, silicates) What type of material is found only as close to the Sun as Jupiter but still further outward? - correct answers.Water ice