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Asteroids | The amount of physical matter that an object contains, usually measured in grams or ounces. |  | A concentration of small celestial bodies between Mars and Jupiter. |  | Any of thousands of celestial bodies with diameters between one and five hundred miles that revolve around the sun in orbits located mostly between those of Jupiter and Mars. |  | (2 Words) Mercury, Venus, Earth, and Mars. |
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Mercury| | 1. The fastest moving planet in the Solar System.
2. This planet is named after the messenger of the gods (from Roman mythology).
| | | (2 Words) Jupiter, Saturn, Uranus, and Neptune. | | | 1. The Great Red Spot is a distinct feature that can be seen on this planet.
2. The largest planet in the Solar System.
| | | 1. This planet has two bright prominent rings.
2. This planet has many moons, including Titan, Dione, Tethys, and Mimas.
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atmosphere| | 1. The curved path in which a planet, satellite, or spacecraft revolves around another body.
2. The invisible curved path followed by an object circling a planet, the sun, or another body.
| | | The mixture of gases that surrounds a planet. | | | The process by which material is worn away by forces such as glaciers, wind, and waves. | | | One complete circular movement made by one object around another object. |
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Mars| | The nine major celestial bodies that orbits the sun. | | | Any planet's natural satellite. | | | 1. Two Viking spacecrafts landed on this planet in 1976.
2. In Roman mythology, this planet is named after the god of war.
| | | 1. The use of mathematics facilitated the discovery of this planet.
2. This planet has the strongest winds in the Solar System.
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Pluto| | 1. This planet has not yet been visited by any spacecraft.
2. This planet has one moon, which is named Charon.
| | | The point in the orbit of a planet or other body at which it comes closest to the sun. | | | 1. This planet is also known as the Red Planet.
2. Two Viking spacecrafts landed on this planet in 1976.
| | | The nearest star to Earth and the center of the Solar System. |
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Sun| | A relatively small, icy celestial body with a long tail of light that revolves around the sun. | | | An imaginary line through the middle of a body or planet, through which that object spins. | | | 1. In Roman mythology, this planet is named after the goddess of love and beauty.
2. The brightest and sixth largest planet in the Solar System.
| | | The nearest star to Earth and the center of the Solar System. |
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craters| | The degree of heat or cold of a body or an environment. | | | A very large group of stars and planets that includes the Sun and its solar system. | | | A bowl-shaped hole on the surface of a planet or moon that was caused by the impact of a meteorite. | | | 1. This planet has not yet been visited by any spacecraft.
2. This planet has one moon, which is named Charon.
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axis| | 1. This planet has eleven known rings, all of which are very faint.
2. This planet's blue color is the result of methane gas in the atmosphere.
| | | The sun and the celestial bodies that orbit the sun, including planets, satellites, asteroids, comets, dust, and gas. | | | An imaginary line through the middle of a body or planet, through which that object spins. | | | The act of turning on, or around, an axis. On Earth, this is equal to 23 hours, 56 minutes, and 4 seconds. |
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temperature| | A bowl-shaped hole on the surface of a planet or moon that was caused by the impact of a meteorite. | | | 1. This planet is named after the messenger of the gods (from Roman mythology).
2. The temperature on this planet ranges from 90 K to 700 K, but it is not the hottest planet in the Solar System.
| | | The degree of heat or cold of a body or an environment. | | | How heavy an object is relative to its size; the ratio of mass to volume. |
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Uranus| | 1. A force that pulls objects toward another object. On Earth, this force pulls things to the ground.
2. The force by which a planet or other such body tends to draw objects toward its center.
| | | Saturn has two of these that are very bright. | | | The mixture of gases that surrounds a planet. | | | 1. This planet's axis is almost parallel to the ecliptic.
2. This planet has eleven known rings, all of which are very faint.
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Saturn| | 1. The curved path in which a planet, satellite, or spacecraft revolves around another body.
2. The invisible curved path followed by an object circling a planet, the sun, or another body.
| | | A concentration of small celestial bodies between Mars and Jupiter. | | | Any planet's natural satellite. | | | 1. This planet is the least dense of any planet.
2. This planet has two bright prominent rings.
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inner planets| | An imaginary line through the middle of a body or planet, through which that object spins. | | | (2 Words) Mercury, Venus, Earth, and Mars. | | | Saturn has two of these that are very bright. | | | The process by which material is worn away by forces such as glaciers, wind, and waves. |
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