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Astronomy Chp 10
Meteors, Asteroids and Comets
| Question | Answer |
|---|---|
| Why is it better to watch for meteor showers around dawn? | sky-watcher is looking in the forward direction of motion of the Earth |
| How can we explain the difference between stony and iron meteorites? originated from iron rich parts in nebula; formed where magnetic field was strong; from fragments of terrestial planets; from core of differentiated asteroids and stones from crust | from core of differentiated asteroids and stones from crust |
| Which of the following statements is true of main-belt asteroids? inner asteroids are silicon rich; outer asteroids are carbon rich; largest asteroids are differentiated due to gravity | all are correct |
| How could we explain the existence of iron-rich and of silicate-rich asteroids? formed in nebulas where only iron could condense; formed in inner part of the belt; originate from volanoes; come from cores of asteroids that broke up | formed from asteroids that broke up |
| Which of the following is true about the nucleus of a comet? about 10 km, contains most of comet's mass, has irregular shape, consists of fluffy icy material | all are correct |
| The Leonid meteor shower occurs in mid November. Which of the following statements regarding the Leonids is true? radiant of the shower is in constellation of Leo; occurs when Earth crosses path of old comet; originate from breakup of comet Leon R | radiant of shower is in constellation Leo & occurs when the Earth crosses path of old comet |
| Which of the following statements is true of Kuiper belt object Sedna? highly elliptical, extending to Oort cloud; may have been pulled outward; may have escaped pluto | orbit is highly elliptical, extending to Oort cloud & may have been pulled outward |
| The Trojan asteroids orbit the Sun at an average distance of ____ . 60 ahead; 60 behind, 5.2 AU, 100,000,000 miles | 5.2 AU |
| Apollo asteroids is a group of asteroids that: cross Earth's orbit; travel on Jupiter's orbit; go between Saturn and Uranus; obit Kirkwood gaps | cross EArth's orbit |
| The typical size of a comet’s nucleus is _____. | 10 km |
| Which object orbits between Mars and Jupiter? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | asteroid ceres |
| Which object travels the farthest from the Sun? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | comet |
| Which object has dust-sized particles? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | meteor shower |
| Which object is close to Saturn’s and Uranus’ orbit? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | chiron |
| Which object occurs every year at about same time? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | meteor shower |
| Which object travels on Jupiter’s orbit? meteor shower; asteroid ceres; comet; chiron; trojan asteroid | trojan asteroid |
| Which object obits between Mars and Jupiter? kirkwood gapl; oort cloud, meteorite, kuiper belt, large asteroid | large asteroid |
| Which object is a short period comet? kirkwood gapl; oort cloud, meteorite, kuiper belt, large asteroid | kuiper belt |
| Which object is a long period comet? kirkwood gapl; oort cloud, meteorite, kuiper belt, large asteroid | oort cloud |
| Which object’s size is a few centimeters? kirkwood gapl; oort cloud, meteorite, kuiper belt, large asteroid | meteorite |
| Which object’s orbit corresponds to a period equal ½ of Jupiter’s period? Which object’s size is a few centimeters? | kirkwood gap |
| Which object is about 200 km in diameter? Which object’s size is a few centimeters? | large asteroid |
| Carbonaceous chondrite describes a _________. comet's nucleus, meteorite, comet's tail, large asteroid, 3:4 ratio to jupiter's orbit | meteorite |
| Kirkwood gaps describes a _________. comet's nucleus, meteorite, comet's tail, large asteroid, 3:4 ratio to jupiter's orbit | 3:4 ratio to jupiter's orbit |
| About 200 km in size describes the length of a _________. comet's nucleus, meteorite, comet's tail, large asteroid, 3:4 ratio to jupiter's orbit | a large asteroid |
| Over 1,000,000 km in size describes the length of a _________. comet's nucleus, meteorite, comet's tail, large asteroid, 3:4 ratio to jupiter's orbit | comet's tail |
| stony iron describes a | meteorite |
| (A) _____________ orbits 60o ahead or behind Jupiter. comet's nucleus; comet's tail, meteor shower; trojan Asteroid; fluorescence | trojan asteroid |
| (A) _____________ has the density of about 0.1 g/cm3. comet's nucleus; comet's tail, meteor shower; trojan Asteroid; fluorescence | comet's nucleus |
Created by:
edeboo