| A | B |
| atmospheric (AT muh SFER ik) | having to do with the mass of air that surrounds the earth |
| bleak (bleek) | ADJ. barren; desolate |
| countless (KOWNT lis) | ADJ. unlimited; infinite |
| crescent (KRES uhnt) | ADJ. characterized by a curved, semi-circular shape |
| dismal (DIZ muhl) | ADJ. dreary; gloomy |
| equinox (EE kwuh NAHKS) | N. one of two times each year when day and night are of equal length |
| expanse (ik SPANS) | N. a wide and open area |
| fragment (FRAG muhnt) | N. a broken or disconnected part |
| gravity (GRAV i tee) | N. the force of attraction toward the center of a celestial body |
| hazy (HAY zee) | ADJ. misty; foggy |
| humid (HYOO mid) | ADJ. moist; damp |
| illumination (i LOO muh NAY shuhn) | N. a lighting up |
| luminescent (LOO muh NES uhnt) | ADJ. capable of emitting light |
| turbulence (TUR byuh luhns) | N. violent motion or agitation |
| luminous (LOO muh nuhs) | ADJ. bright; giving off light |
| meteorology (MEE tee uh RAHL uh jee) | N. science dealing with weather and weather forecasting |
| phenomenon (fi NAHM uh NAHN) | N. an unusual or significant occurrence |
| refraction (ri FRAK shuhn) | N. bending or deflection of a ray of |
| solstice (SAHL stis) | N. time of year when the sun is farthest from the equator |
| sultry (SUHL tree) | ADJ. hot and moist; sweltering |