Download exploring plantetary systems 2017 study guide

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EXPLORING PLANTETARY SYSTEMS 2017 STUDY GUIDE
1. Earth is a _SPHERE___, which is a round, three-dimensional object.
2. The planet with the lowest density and hundreds of thin rings is SATURN
3. A planet that is very hot and has sulfuric acid in its clouds is VENUS.
4. Two planets with similar mass and size are _EARTH AND VENUS
5. The planet that averages 150 million km, or one AU, from the Sun is ___EARTH____.
6. The largest known volcano in the solar system is an extinct volcano known as Olympus Mons found on the
planet ___MARS_____.
7. The smallest planet and the one closest to the sun is _____MERCURY____.
8. A planet that appears reddish-yellow due to iron oxide in its rocks is _____MARS____.
9. The largest of __SATURN’S_ moons, Titan, is larger than the planet Mercury.
10. Now the planet __NEPTUNE_ is actually the farthest planet from the Sun.
11.The Great Red Spot, a continuous storm, is located on the planet __JUPITER___.
12.Methane gives _URANUS___ & ___NEPTUNE__ their blue-green color.
13.The solid portion of a comet is called its __NUCLEUS______.
14.A cloud of gases around the solid portion of a comet is known as the _____COMA____.
15._____METEOROIDS_____ are small pieces of rock moving through space.
16.Two of the inner planets are _MARS, EARTH, VENUS OR MERCURY_
17.This body is no longer consider a planet because it is least like its close neighbor is _PLUTO______.
18.____COPERNICUS___ published the Sun-centered model of the solar system in 1543.
19.When small pieces of rock moving through space enter Earth’s atmosphere and completely burn up, they are
called ____METEOR.
20.Pieces of rock that actually strike Earth’s surface are called ____METEORITE_________.
21.Most asteroids are located in an area between the orbits of _MARS___ & _JUPITER__.
22.Scientists theorize that the asteroid belt did not form a planet because ___JUPITER’S GRAVITY___
23.The positions of the constellations appear to change throughout the year because _____EARTH’S
REVOLUTION AROUND THE SUN
24. About 90 percent of all stars are ____MAIN SEQUENCE__ stars.
25. The hottest stars in space are _______________BLUE______ in color.
26.The Sun produces energy by fusing hydrogen into __HELIUM____ in its core.
27. Its ____APPARENT MAGNITUDE __ makes Sirius, the dog star, the brightest star in the night sky.
28. A galaxy that has a shape similar to a football, or oval,is a(n) __ELLIPTICAL galaxy.
29. A BLACK HOLE___ is an object so dense that nothing can escape its gravity field.
30. Dark, cooler areas on the Sun’s surface are called ____SUNSPOTS____________.
31. The coolest stars in the sky are _____RED______ in color.
32. A large group of stars, gas, and dust held together by gravity is a __GALAXY___.
33. A main sequence star becomes a GIANT after it uses up the hydrogen in its core.
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