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Planets, Moon, Stars

StudyStack to prepare for the Planets, Moon, Sun, & Stars Exam: 4th Grade

QuestionAnswer
Sun A ball of glowing gases in space, the center of our solar system.
orbit The path a smaller body takes around a larger body.
Venus The second planet from the sun, the hottest planet, nearly the same size as Earth.
Inner Planets A nicknames given to the first four planets: Mercury, Venus, Earth and Mars.
Saturn The sixth planet from the sun, famous for its spectacular rings.
Neptune The eighth and farthest planet from the sun, blue in color, with very high winds and faint, uneven rings.
Mercury The closest planet to the sun, it has almost no atmosphere and no moons. It is the tiniest planet.
Jupiter The fifth and largest planet, this planet has more mass than the other seven planets combined. It has many moons and very faint rings.
Uranus The seventh planet from the sun is not the furthest planet, yet it is the coldest planet. It has a ring system, many moons, and is tilted nearly sideways in its orbit.
Outer Planets A nickname given to the four planets furthest from the sun: Jupiter, Saturn, Uranus, and Neptune. The are also called "gas giants".
constellation A star pattern or picture, often of Greek or Latin gods and myths.
revolve To move around the sun in an orbit. One of these is equal to one year.
rotate To turn on a axis, producing day and night, as well as seasons.
crater A hollow area, sometimes formed from the impact of a meteor or asteroid.
asteroid A chunk of rock, metal, and/or ice in space. A large ring of these exists between the orbits of Mars and Jupiter.
gravity A force of attraction. The sun uses this force to keep the eight planets in orbit.
year The amount of time taken to complete one revolution (orbit) around the sun.
Created by: briansegool