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- Multiple ChoicePlease save your changes before editing any questions.Unlike asteroids, which are mostly rock, comets are a more balanced mixture of _____metal and icerock and metalice and rockrock and minerals
- Multiple ChoicePlease save your changes before editing any questions.As comets progress through their elliptical orbits, they are heated mostly by _____the Sunfrictioninternal molten metalsconvection of gases
- Multiple ChoicePlease save your changes before editing any questions.The process of ice turning directly into a gas is called _____fusionconvectionsublimationevaporation
- Multiple ChoicePlease save your changes before editing any questions.The solid part of a comet is called the _____corekernalnucleuscoma
- Multiple ChoicePlease save your changes before editing any questions.What is the gaseous cloud around a comet called?auracomawisphaze
- Multiple ChoicePlease save your changes before editing any questions.The “ion tail”, produced by the solar wind acting on ionized gas, points _____towards the sunaway from the Sunbehind the comet in its orbitahead of the comet in its orbit
- Multiple ChoicePlease save your changes before editing any questions.The dust stream from a comet points _____towards the sunaway from the Sunbehind the comet in its orbitahead of the comet in its orbit
- Multiple ChoicePlease save your changes before editing any questions.Short-period comets are defined as comets with an orbital period less than _____2 years20 years200 years2,000 years
- Multiple ChoicePlease save your changes before editing any questions.What are comets made of?Metals like iron and nickelGasHydrogen GasIce and rock
- Multiple ChoicePlease save your changes before editing any questions.The orbit of comets is which shape?CircularElliptical/OvalComets do not orbit the Sun
- Multiple ChoicePlease save your changes before editing any questions.
Where do most comets come from?
In the Kuiper Belt & Oort Cloud beyond Neptune's orbit
In the Asteroid Belt between Mars and Jupiter
Near the Sun
Earth's atmosphere
- Multiple ChoicePlease save your changes before editing any questions.In the diagram, a comet's tail always points where?Towards the SunAway from the SunTowards EarthAway from Earth
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Sometimes I am called a "dirty snowball."
Asteroid
Star
Meteor
Comet
- Multiple ChoicePlease save your changes before editing any questions.Which king, in 1066, considered the sighting of a comet as a good omen?King Henry VIIIKing Harold IIKing William IKing Richard I
- Multiple ChoicePlease save your changes before editing any questions.The solid part of a comet is called the _____corekernalnucleuscoma
- Multiple ChoicePlease save your changes before editing any questions.Which comet appeared incredibly bright and gorgeous in 1997?Comet McNaughtComet HalleyComet Hale-BoppComet 67P/C-G
- Multiple ChoicePlease save your changes before editing any questions.Which European mission studied a young comet that looked like a "cosmic rubber ducky"?XMM-NewtonRosettaHuygensGaia
- Multiple ChoicePlease save your changes before editing any questions.What happened to Philae, the lander sent down by Rosetta?it bounced off the surfaceit skidded along the surfaceit sank into the surfaceit gently landed on the surface
- Multiple ChoicePlease save your changes before editing any questions.
What compromises the structure of a comet?
Nucleus, Coma, Dust tail, Ice
Nucleus, Dust tail & gases
Nucleus, Coma, dust tail & gas tail (ion tail)
- Multiple ChoicePlease save your changes before editing any questions.
As comets approach the sun they travel faster and have:
shorter tails
medium tails
longer tails
no tails due to solar winds