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Chapter 6
Space and Earth Science-Minor Planets
| Question | Answer |
|---|---|
| Why are comets visible? | They reflect light |
| The Largest Minor planet is? | Ceres |
| Most of the Minor planets are located between? | Mars and Jupiter |
| The minor planets in the same family have similar | orbits |
| The nucleus of a comet consist of | Rocks, dust and ices |
| a type 1 comet tail consist mainly of ? | Gas |
| What are meteors that appear to come from random directions? | Sporadic meteors |
| Shower meteors are the remnants of what? | Broken-up comets |
| Where are meteorites found? | on the earth |
| what is the brightest minor planet | Vesta |
| Minor planets appear as ______________ in photos taken through telescopes | streaks |
| Minor planets are also called | asteroids |
| what type of asteroids all have nearly the same orbit as Jupiter | Trojan |
| Haley comet appears every how many years? | 75 to 76 |
| Most of the comets material is found in the | nucleus |
| the comets that keep returning over a period of time are called | periodic |
| lighted trails left by meteoric fireballs are called | Trains |
| More meteors are visible after | Midnight |
| we know large meteors have struck the earth because of what? | METEORITE CRATERS |
| the little amount meteorite fossils in sedimentary rocks is evidence of what? | A young earth |
| Compare the largest asteroid with pluto | The largest minor planet Ceres is less than half the size of Pluto |
| Why do the most near-Earth asteroids not a threat to the Earth | Their orbits are tilted so that they do not intersect the earth's orbit; Their perihelion's are outside the Earth's orbit. |
| Name two ways comets degenerate | due to the boiling away of ices and ejection of dust each time the comet passes close to the sun. the gravity of large planets can fracture the nucleus into fragments |
| Why do meteors glow? | Friction with the atmosphere heat until they glow. |
| Why are meteors more visible at midnight? | After midnight observers are on the leading side of the earth in its orbit as it sweeps up meteoroids in the path |
| an exploding meteor | Bolide |
| a "shooting star" | Meteor |
| a small rocky object orbiting the sun in space | meteorid |
| These occur when the orbit of Earth and a former comet intercept. | shower meteors |
| a shooting star survives its fall through the atmosphere | meteorite |
| meteorites that can be etched and polished to show Widmanstatten lines | irons |
| a depression in the ground caused by a meteorite | crater |
| the location of a possible comet impact in Siberia | Tunguska |
| Do minor do or do not have an atmosphere | Do not |
| what asteroids are in near-Earth orbit? | Aten |
| Is earth in danger of being hit by a minor planet? | No |
| What can have many tails? | Comet |
| What kind of orbit does a periodic comets have? | |
| how long is the shortest period of a comet? | 3.3 years |
| Who have a problem explaining Comets and their sources? | Evolutionist |
| What happens to most meteors before reaching the earth's surface? | the comets burn up |
Created by:
mrschulgin
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