| 1. THE ABILITY OF AN ORGANISM TO CHANGE IN RESPONSE TO ITS ENVIRONMENTAL SURROUNDINGS IN ORDER TO SURVIVE(ADAPTATION) |
2. A LARGE ENVIRONMENTAL AREA CHARACTERIZED BY SIMILAR VEGETATION, TEMPERATURE, OR OTHER ENVIRONMENTAL CHARACTERISTICS(BIOME) |
| 3. THE NATURAL, CONTINUOUS COVER PROVIDED BY THE BRANCHES AND LEAVES OF TREES BLOCKING OUT SUNSHINE TO GROUND LEVEL PLANTS(CANOPY) |
4. THE STRUGGLE BETWEEN THE ORGANISMS OF AN ECOSYSTEM TO OBTAIN THE RESOURCES NEEDED FOR SURVIVAL(COMPETITION) |
| 5. A BIOME CHARACTERIZED BY EXTREMELY DRY CONDITIONS, USUALLY SANDY WITH LITTLE TO NO VEGETATION(DESERT) |
6. A LONG PERIOD OF TIME WITH LITTLE TO NO RAINFALL(DROUGHT) |
| 7. THE LINE THAT DIVIDES THE EARTH INTO TWO EQUAL PARTS, THE NORTHERN HEMISPHERE AND SOUTHERN HEMISPHERE, AND OVER THE COURSE OF A YEAR RECEIVES THE MOST AMOUNT OF HEAT FROM THE SUN CAUSING SEASONAL CHANGES IN WEATHER TO BE LESS DRAMATIC AND ALMOST NON-EXIST(EQUATOR) |
8. THE MOST WIDESPREAD LAND-BASED BIOME ON EARTH THAT CONTAINS MOSTLY GRASS LIKE VEGETATION WITH FEW TO NO TREES, EXPERIENCES SEASONAL CHANGES IN WEATHER, AND RECEIVES AVERAGE AMOUNTS OF RAINFALL(GRASSLAND) |
| 9. THE LARGEST BODY OF WATER ON EARTH COVERING MORE THAN 70% OF THE SURFACE WITH A SALT CONTENT OF 3% OR GREATER(OCEAN) |
10. A TERM USED TO DESCRIBE LAND OR SOIL THAT IS PERMANENTLY FROZEN THUS UNABLE TO SUPPORT VEGETATION GROWTH(PERMAFROST) |
| 11. THE TERM USED TO REFER TO MOISTURE THAT FALLS TO THE EARTH'S SURFACE IN THE FORM OF RAIN, SNOW, OR SLEET(PRECIPITATION) |
12. A BIOME CHARACTERIZED BY DENSE TREE GROWTH WITH A THICK, MULTILAYERED CANOPY, HIGH AMOUNTS OF PRECIPITATION, AND AN AVERAGE TEMPERATURE OF 77 DEGREES FAHRENHEIT THAT DOESN'T VARY MORE THAN ABOUT 5 DEGREES ALL YEAR(RAINFOREST) |
| 13. ONE OF THE SUB-CATEGORIES OF THE GRASSLAND BIOME CHARACTERIZED BY A WET AND DRY SEASON WITH MODERATE TO SIGNIFICANT TREE GROWTH BUT WHERE THE TREES ARE TOO SPARSE TO FORM A CANOPY(SAVANNA) |
14. THE COLDEST BIOME ON EARTH, CHARACTERIZED BY NO TREES, A LAYER OF PERMAFROST UNDER THE TOP LAYER OF SOIL, AND LOW PRECIPITATION(TUNDRA) |
| 15. ONE OF THE MOST BIOLOGICALLY DIVERSE BIOMES, CHARACTERIZED BY STANDING WATER SUCH AS MARSHES, BOGS, AND SWAMPS; HIGH PRECIPITATION; AND USUALLY HUMID CONDITIONS(WETLANDS) |