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Our Universe
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Atmosphere: The layer of gases surrounding the surface of a planet, moon, or star.
Aurora: A phenomenon produced when the solar wind (made up of energized electrons and protons) disturbs the atoms and molecules in a planet’s upper atmosphere
Crater: A bowl-shaped depression caused by a comet or meteorite colliding with the surface of a planet, moon, or asteroid. On geologically active moons and planets (like Earth), craters can result from volcanic activity.
Earth: The third planet from the Sun and one of four terrestrial planets in the inner solar system.
Erosion: Natural processes that wear or grind away the surface of an object. On Earth, the major agents of erosion are water and wind.
Extraterrestrial: An adjective that means “beyond the Earth.” The phrase “extraterrestrial life” refers to possible life on other planets.
Fault: A geological term that refers to a fracture or a break in a hard surface like the Earth's crust.
Ionosphere: A region of the Earth’s upper atmosphere where solar radiation ionizes the air molecules.
Jupiter: The fifth planet from the Sun and the largest planet in our solar system, twice as massive as all the other planets combined.
Lithosphere: The solid part of a planet’s surface, composed of the crust and upper mantle.
Mantle: The interior region of a terrestrial (rocky) planet or other solid body that is below the crust and above the core.
Mars: The fourth planet in the solar system and the last member of the hard, rocky planets (the inner or terrestrial planets) that orbit close to the Sun.
Mercury: The closest planet to the Sun
Neptune: The eighth planet and the most distant giant gaseous planet in our solar system.
Ozone Layer: A region in the upper atmosphere that has high concentrations of ozone (triatomic oxygen, 03).
Planet: An object that orbits a star.
Pluto: A dwarf planet whose small size and composition of ice and rock resembles the comets in the Kuiper Belt, a region beyond Neptune’s orbit where Pluto resides.
Saturn: The sixth planet in the solar system, noted for its obvious ring structure.
Uranus: The third largest planet in the solar system and the seventh from the Sun.
Venus: An inner, terrestrial (rocky) planet that is slightly smaller than Earth.
Chromosphere: The middle layer of the solar atmosphere between the photosphere and the corona.
Corona: The outermost layer of the atmosphere of a star, including the Sun.
Solar Eclipse: A phenomenon in which the Moon’s disk passes in front of the Sun, blocking sunlight.
Sun: The star at the center of our solar system.
Comet: A ball of rock and ice, often referred to as a “dirty snowball.”
Lunar Eclipse: A darkening of the Moon, as viewed from Earth, caused when our planet passes between the Sun and the Moon.
Moon: A large body orbiting a planet. On Earth’s only moon, scientists have not detected life, water, or oxygen on this heavily cratered body.
Asteroid: A small solar system object composed mostly of rock
Meteor: A bright streak of light in the sky caused when a meteoroid enters the Earth’s atmosphere.
Our Universe
Across:1. | The middle layer of the solar atmosphere between the photosphere and the corona. | 9. | The interior region of a terrestrial (rocky) planet or other solid body that is below the crust and above the core. | 11. | An object that orbits a star. | 13. | A dwarf planet whose small size and composition of ice and rock resembles the comets in the Kuiper Belt, a region beyond Neptune’s orbit where Pluto resides. | 17. | The outermost layer of the atmosphere of a star, including the Sun. | 18. | An inner, terrestrial (rocky) planet that is slightly smaller than Earth. | 20. | A small solar system object composed mostly of rock | 21. | The fourth planet in the solar system and the last member of the hard, rocky planets (the inner or terrestrial planets) that orbit close to the Sun. | 23. | A phenomenon produced when the solar wind (made up of energized electrons and protons) disturbs the atoms and molecules in a planet’s upper atmosphere | 24. | The third largest planet in the solar system and the seventh from the Sun. | 26. | A bowl-shaped depression caused by a comet or meteorite colliding with the surface of a planet, moon, or asteroid. On geologically active moons and planets (like Earth), craters can result from volcanic activity. | 27. | The eighth planet and the most distant giant gaseous planet in our solar system. |
| | Down:1. | A ball of rock and ice, often referred to as a “dirty snowball.” | 2. | The closest planet to the Sun | 3. | A phenomenon in which the Moon’s disk passes in front of the Sun, blocking sunlight. | 4. | The third planet from the Sun and one of four terrestrial planets in the inner solar system. | 5. | An adjective that means “beyond the Earth.” The phrase “extraterrestrial life” refers to possible life on other planets. | 6. | A large body orbiting a planet. On Earth’s only moon, scientists have not detected life, water, or oxygen on this heavily cratered body. | 7. | A region of the Earth’s upper atmosphere where solar radiation ionizes the air molecules. | 8. | A darkening of the Moon, as viewed from Earth, caused when our planet passes between the Sun and the Moon. | 10. | The solid part of a planet’s surface, composed of the crust and upper mantle. | 12. | The layer of gases surrounding the surface of a planet, moon, or star. | 14. | A region in the upper atmosphere that has high concentrations of ozone (triatomic oxygen, 03). | 15. | A geological term that refers to a fracture or a break in a hard surface like the Earth's crust. | 16. | The fifth planet from the Sun and the largest planet in our solar system, twice as massive as all the other planets combined. | 19. | Natural processes that wear or grind away the surface of an object. On Earth, the major agents of erosion are water and wind. | 22. | A bright streak of light in the sky caused when a meteoroid enters the Earth’s atmosphere. | 25. | The sixth planet in the solar system, noted for its obvious ring structure. |
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PuzzleFast.com, Noncommercial Use Only
Our Universe
Across:1. | The middle layer of the solar atmosphere between the photosphere and the corona. | 9. | The interior region of a terrestrial (rocky) planet or other solid body that is below the crust and above the core. | 11. | An object that orbits a star. | 13. | A dwarf planet whose small size and composition of ice and rock resembles the comets in the Kuiper Belt, a region beyond Neptune’s orbit where Pluto resides. | 17. | The outermost layer of the atmosphere of a star, including the Sun. | 18. | An inner, terrestrial (rocky) planet that is slightly smaller than Earth. | 20. | A small solar system object composed mostly of rock | 21. | The fourth planet in the solar system and the last member of the hard, rocky planets (the inner or terrestrial planets) that orbit close to the Sun. | 23. | A phenomenon produced when the solar wind (made up of energized electrons and protons) disturbs the atoms and molecules in a planet’s upper atmosphere | 24. | The third largest planet in the solar system and the seventh from the Sun. | 26. | A bowl-shaped depression caused by a comet or meteorite colliding with the surface of a planet, moon, or asteroid. On geologically active moons and planets (like Earth), craters can result from volcanic activity. | 27. | The eighth planet and the most distant giant gaseous planet in our solar system. |
| | Down:1. | A ball of rock and ice, often referred to as a “dirty snowball.” | 2. | The closest planet to the Sun | 3. | A phenomenon in which the Moon’s disk passes in front of the Sun, blocking sunlight. | 4. | The third planet from the Sun and one of four terrestrial planets in the inner solar system. | 5. | An adjective that means “beyond the Earth.” The phrase “extraterrestrial life” refers to possible life on other planets. | 6. | A large body orbiting a planet. On Earth’s only moon, scientists have not detected life, water, or oxygen on this heavily cratered body. | 7. | A region of the Earth’s upper atmosphere where solar radiation ionizes the air molecules. | 8. | A darkening of the Moon, as viewed from Earth, caused when our planet passes between the Sun and the Moon. | 10. | The solid part of a planet’s surface, composed of the crust and upper mantle. | 12. | The layer of gases surrounding the surface of a planet, moon, or star. | 14. | A region in the upper atmosphere that has high concentrations of ozone (triatomic oxygen, 03). | 15. | A geological term that refers to a fracture or a break in a hard surface like the Earth's crust. | 16. | The fifth planet from the Sun and the largest planet in our solar system, twice as massive as all the other planets combined. | 19. | Natural processes that wear or grind away the surface of an object. On Earth, the major agents of erosion are water and wind. | 22. | A bright streak of light in the sky caused when a meteoroid enters the Earth’s atmosphere. | 25. | The sixth planet in the solar system, noted for its obvious ring structure. |
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© 2014
PuzzleFast.com, Noncommercial Use Only