Across
- 3. The horizontal movement of air from an area of high pressure to an area of lower pressure
- 4. cloud A puffy white cloud with a flat bottom that forms at a low or medium elevation
- 7. (of the moon) pertaining to the period during which the visible surface of the moon increases
- 11. night Period in the polar regions in winter when the sun does not rise
- 12. A large cloud of dust and gas in space
- 14. A group of stars that form a pattern in the sky
- 17. planet An object that orbits the sun and is spherical, but has not cleared the area of its orbit.
- 20. a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs
- 21. belt A region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made mostly of ice
- 24. moon Moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth.
- 25. A loose collection of ice and dust that orbits the sun
- 26. 2nd layer of atmosphere; extends from 10 to 30 miles up; location of ozone layer; weather balloons and commercial jets fly in this layer
- 27. cloud A flat, low-lying cloud that covers sky like a blanket; can produce rain or drizzle
- 29. A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
- 30. a small rocky body orbiting the sun
- 31. 3rd layer of the atmosphere; where meteors burn up and become "shooting stars"
- 32. the outermost region of Earth's atmosphere.
- 38. The layer of gases that surrounds Earth
- 40. belt the region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
- 42. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
- 43. All the water at and near the surface of the earth, 97% of which is in oceans
- 44. half of the earth
- 45. A gigantic explosion in which a massive star collapses and throws its outer layers into space
Down
- 1. cloud Wispy, feathery clouds made of ice crystals that form at high levels.
- 2. cloud tallest cloud that forms from piled up cumulus clouds and brings thunderstorms.
- 5. planets The name given to the four inner planets: Mercury, Venus, Earth, and Mars
- 6. pressure the pressure caused by the weight of a column of air pushing down on an area
- 8. a natural object that orbits a planet
- 9. eclipse Occurs at a full moon when Earth is directly between the moon and the sun
- 10. planets Gaseous planets: Jupiter, Saturn, Uranus, Neptune.
- 13. hole An object in space whose gravity is so strong not even light can escape.
- 15. fusion The process by which two or more small nuclei fuse to make a bigger nucleus
- 16. sun continuous daylight, a time when the sun is visible at midnight during the summer at the north and south pole
- 18. Frozen water on earth
- 19. moon when the size of the illuminated portion of the moon is greater than half but not a full moon,
- 22. the part of Earth where life exists
- 23. The darkest part of a shadow cast during an eclipse; areas in the umbra will experience a total eclipse
- 28. The lowest layer of Earth's atmosphere; where we live, where weather occurs and clouds are found
- 33. 4th layer of the atmosphere and the hottest layer
- 34. eclipse Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
- 35. the lighter part of a shadow cast during an eclipse; areas in the penumbra will experience a partial eclipse
- 36. (of the moon) pertaining to the period during which the visible surface of the moon decreases
- 37. the solid part of the earth consisting of the crust and outer mantle
- 39. North Star
- 41. An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.