Question | Answer | Question | Answer | Question | Answer |
Axis | an imaginary line that passes through Earth's center and the North and South poles, about which the Earth rotates. | Orbit | the path of an object as it revolves around another object in space. | Comet | a loose collection of ice, dust, and small rocky particles, typically with a long narrow orbit |
Diameter | 1.A straight line passing from side to side through the center of a body or figure, | Greenhouse Effect | the trapping of heat by a planet's atmosphere. | Kuiper Belt | a doughnut shaped region that stretches from around Pluto's orbit to abut 100 times Earth's distance fromt the Sun. |
Milky Way | the spiral galaxy in which our solar system is located | Terrestrial Planet | the four inner planets, they have rocky surfaces. | Oort Cloud | a spherical region of comets that surrounds the solar system. |
Moon Phase | one of the apparent shapes of the moon as seen from Earth. | Gas Giant | name given to the first four outer planets; Jupiter, Saturn, Uranus,Neptune | Asteroid Belt | the region of the solar system between the orbits aof Mars and Jupiter, where many asteroids are found |
Planet | celestial body orbiting a star | Asteroid | Rocky objects revolving around the sun that a too small and numerous to be considered planets. | Meteoroid | a chuck of rock or dust in space |
Rotation | the spinning motion of a planet on its axis | Ring | a thin disk of small ice and rock particles surrounding a planet | Meteorite | a meteoroid that passes through the atmosphere and hits Earth's surface |
Revelution | the amount of time it takes for the Earth to go around the Sun, 365 days. | Meteor | a streak of light in the sky produced by the buring of a meteoroid in Earth's atmosphere | | |