* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Name________________________________________
Survey
Document related concepts
Theoretical astronomy wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Outer space wikipedia , lookup
Tropical year wikipedia , lookup
Astronomical unit wikipedia , lookup
Impact event wikipedia , lookup
Cosmic dust wikipedia , lookup
Late Heavy Bombardment wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Comparative planetary science wikipedia , lookup
Sample-return mission wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Directed panspermia wikipedia , lookup
Solar System wikipedia , lookup
Transcript
Reflection Questions (5 possible test questions): COMETS, ASTEROIDS, AND METEORS COMETS… Comets are loose collections of _________, dust, or _______________ particles whose _________________ are usually very long, narrow ellipses. You can think of a comet as a “dirty ______________________.” The comet’s head… When a comet gets close enough to the ______________, the energy in the sunlight turns the ice into gas, releasing __________ and _______________. Clouds of gas and dust form a fuzzy outer layer called a _______________. A comet’s coma has a solid inner core called a ____________________. The nucleus and coma (the comet’s head) is the _________________________ part of a comet. The comet’s tail… As a comet approaches the sun and heats up, some of the gas and dust stream outward, forming a __________________. The name “comet” means “___________________________ star” in Greek. Most comets have two tails, a gas tail and a dust tail. Both tails usually point ____________________ from the sun due to the force of ______________________________ from the sun. A comet’s tail can be more than _______________ million kilometers long. Origins of comets… Most comets are found in one of two distant regions of the solar system- the _______________________ belt and the _________________ cloud. The Kuiper belt is a doughnut shaped region that extends from beyond __________________________ orbit to about _________ times Earth’s distance from the sun. The Oort cloud is a spherical region of __________________ that surrounds the solar system out to more than __________________ times the distance between ________________ and the sun. ASTEROIDS… Asteroids are ________________ objects in space that are too small and ____________________ to be considered real _____________________. Most asteroids revolve around the sun between the orbits of __________________ and _____________________. This region of the solar system is called the ______________________________________. METEOROIDS… A meteoroid is a chunk of rock or dust in space. Meteoroids come from ___________________ or ________________________. Some form when asteroids ___________________ in space; others form when a comet breaks up and creates a __________________ of dust that continues to move across the solar system. METEORS… When a meteoroid enters Earth’s ________________________, friction with the air creates heat and produces a streak of __________________ in the sky- a meteor. METEORITES… If the meteoroid is _____________________ enough, it may not burn up completely. Meteoroids that pass through the atmosphere and hit Earth’s ____________________ are called meteorites. Summary (5 sentences) _________________________________________________________________________