| Aurora |
bands or streamers of light that appear in the sky at night in areas around the magnetic poles, caused by solar particles striking atoms in the outer part of the earth's atmosphere. |
| conceivable |
capable of being thought of or imagined; thinkable. |
| conditional |
depending on certain circumstances or events. |
| dependent |
relying on another for help or to provide what one needs. |
| dispatch |
to send off to a particular place or for a particular purpose. |
| earnest |
having or showing a serious manner. |
| ecology |
the scientific study of the relationships between living things and their environments. |
| milestone |
an important event or turning point in history or in a person's life. |
| miser |
a greedy, stingy person who lives in a poor way in order to save money. |
| negotiate |
to bargain or come to an agreement with another person. |
| rant |
to speak or complain loudly and vehemently. |
| spectator |
one that watches or observes. |
| transition |
a process of changing from one position, stage, or situation to another. |
| unnecessary |
not needed or required. |
| urban |
of or having to do with a city or town. |