Semester Exam Review

Across

2. The horizontal movement of air from an area of high pressure to an area of lower pressure
5. 2nd layer of atmosphere; extends from 10 to 30 miles up; location of ozone layer; weather balloons and commercial jets fly in this layer
8. cloud A puffy white cloud with a flat bottom that forms at a low or medium elevation
11. The lowest layer of Earth's atmosphere; where we live, where weather occurs and clouds are found
12. half of the earth
16. the pressure caused by the weight of a column of air pushing down on an area
17. a small rocky body orbiting the sun
18. 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.
19. The darkest part of a shadow cast during an eclipse; areas in the umbra will experience a total eclipse
20. North Star
23. A _____ eclipse occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
25. hole An object in space whose gravity is so strong not even light can escape.
27. (of the moon) pertaining to the period during which the visible surface of the moon decreases
29. A gigantic explosion in which a massive star collapses and throws its outer layers into space
32. A group of stars that form a pattern in the sky
35. the region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
37. when the size of the illuminated portion of the moon is greater than half but not a full moon,
39. 4th layer of the atmosphere and the hottest layer
40. cloud A flat, low-lying cloud that covers sky like a blanket; can produce rain or drizzle
42. A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
43. a collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs

Down

1. A region of the solar system that is just beyond the orbit of Neptune and that contains small bodies made mostly of ice
3. Frozen water on earth
4. a natural object that orbits a planet
6. The process by which two or more small nuclei fuse to make a bigger nucleus
7. All the water at and near the surface of the earth, 97% of which is in oceans
9. the solid part of the earth consisting of the crust and outer mantle
10. A loose collection of ice and dust that orbits the sun
13. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
14. the lighter part of a shadow cast during an eclipse; areas in the penumbra will experience a partial eclipse
15. continuous daylight, a time when the sun is visible at midnight during the summer at the north and south pole
18. Period in the polar regions in winter when the sun does not rise
21. A _____ eclipse occurs at a full moon when Earth is directly between the moon and the sun
22. cloud Wispy, feathery clouds made of ice crystals that form at high levels.
24. cloud tallest cloud that forms from piled up cumulus clouds and brings thunderstorms.
26. Gaseous planets: Jupiter, Saturn, Uranus, Neptune.
27. (of the moon) pertaining to the period during which the visible surface of the moon increases
28. A large cloud of dust and gas in space
30. the outermost region of Earth's atmosphere.
31. The layer of gases that surrounds Earth
33. 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.
34. the part of Earth where life exists
36. planet An object that orbits the sun and is spherical, but has not cleared the area of its orbit.
38. 3rd layer of the atmosphere; where meteors burn up and become "shooting stars"
41. The name given to the four inner planets: Mercury, Venus, Earth, and Mars