Chapter 19 Vocab -The Solar System
Accretion
Aristotle
Asteroid
Astronomical Unit (AU)
Comet
Copernicus
Dwarf planet
Earth
Eclipse
Ellipse
Exoplanet
Gas Giants
Geocentric
Gravity
Heliocentric
Hydrosphere
Jupiter
Kepler
Kuiper Belt
Lunar Eclipse
Maria
Mars
Mercury
Meteor
Meteorite
Meteoroid
Nebula
Nebular hypothesis
Neptune
Newton
Oort cloud
Phase
Planet
Planetesimals
Ptolemy
Satellite
Saturn
Solar Eclipse
Solar system
Sustain
Terrestrial Planets
Uranus
Venus

1. ________­­­­___________________-
A celestial body that orbits the sun, is round because of its own gravity, and has cleared the area around its orbital path
2. ________­­­­___________________-
A celestial body that orbits the sun, is round because of its own gravity, but has not cleared its orbital path
3. ________­­­­___________________-
A large cloud of dust and gas in space
4. ________­­­­___________________-
A model for the formation of our solar system
5. ________­­­­___________________-
A planetlike body that orbits a star other than the sun
6. ________­­­­___________________-
A small body of ice, rock and cosmic dust that orbits the sun
7. ________­­­­___________________-
A spherical region in the outer solar system beyond the Kuiper Belt where most comets originate (begin)
8. ________­­­­___________________-
All the water on Earth’s surface, both liquid and frozen
9. ________­­­­___________________-
An object that orbits around a celestial body that is greater in mass
10. ________­­­­___________________-
Burning rock that is traveling through Earth’s atmosphere
11. ________­­­­___________________-
Change in the illuminated area of one celestial body as seen from another celestial body; our moon has 8 of these
12. ________­­­­___________________-
Dark patches on the moon
13. ________­­­­___________________-
Earth-centered
14. ________­­­­___________________-
First planet to be discovered using observed changes in the expected orbit of another planet; furthest planet from the sun
15. ________­­­­___________________-
Greek philosopher who explained the phases of the moon and eclipses by using a model of the solar system with Earth at the center
16. ________­­­­___________________-
Largest planet in the solar system; has the most satellite
17. ________­­­­___________________-
Meteor that hits the ground and causes a crater
18. ________­­­­___________________-
Most habitable planet because of its atmosphere and hydrosphere
19. ________­­­­___________________-
Occurs when Earth is between the sun and the moon
20. ________­­­­___________________-
Occurs when the moon is between the Earth and the sun
21. ________­­­­___________________-
Particles that become planets
22. ________­­­­___________________-
Planet closes to the sun
23. ________­­­­___________________-
Planet known for its “runaway” greenhouse effect
24. ________­­­­___________________-
Planet tilted over on its side
25. ________­­­­___________________-
Planet with the most extensive ring system
26. ________­­­­___________________-
Process by which small particles collide and stick together
27. ________­­­­___________________-
Scientist who added to Aristotle’s work by stating the sun and planets orbited the Earth in perfect circles.
28. ________­­­­___________________-
Scientist who explained that gravity keeps the planets in orbit around the sun and satellites in orbit around planets
29. ________­­­­___________________-
Scientist who improved Copernicus’s model by proposing that the orbits around the sun are ellipses rather than circles
30. ________­­­­___________________-
Scientist who proposed a sun centered model; and state that the Earth and other planets orbit the sun in perfect circles
31. ________­­­­___________________-
Site of the largest mountain in the solar system; appears red; thin CO2 atmosphere
32. ________­­­­___________________-
Small rock in space; smaller than an asteroid