Question | Answer |
The average distance from earth to the sun | Astronomical Units |
The time it takes an object to travel once around the sun | Period of Revolution |
The time it takes an object to complete one rotation on its axis | Period of Rotation |
Orbit the sun in the asteroid belt | Asteroids |
is the process by which atoms form a solid with an orderly, repeating pattern. Some crystals are formed from magma and other are from water. | Crystallization |
minerals that are valuable because of their appearance | Gemstones |
is an naturally occurring solid mixture composed of minerals, smaller rock fragments, organic matter, or glass | Rock |
when lava cools and crystallizes on Earth's surface | Extrusive Rock |
when magma cools and crystallizes inside Earth | Intrusive Rock |
the process of laying down sediment in a new location. | Deposition |
is the extinction of many species on Earth within a short period of time | Mass Extinction |
connects two continents that were previously separated | Land Bridge |
a body of water formed when ocean water floods continents | Inland Sea |
an oxygen poor environment where, over time, plant material changed into coal | Coal Swamp |
a time when a large proportion of Earth's surface is covered with glaciers | Ice Age |
large mammals of the Cenozoic era | Mega Mammals |
the living or once-living parts of an environment | Biotic |
the non-living parts that the living parts of an environment need to survive. | Abiotic |
is a geographic area on Earth that contains ecosystems with similar biotic and abiotic features | Biomes |
the process of one ecological community gradually changing into another | Ecological Succession |
a stable community that no longer goes through major ecological changes | Climax Community |
the first species that colonize new or undisturbed land. | Pioneer Species |
when a freshwater ecosystem changes over time in a natural, predictable process | Aquatic Succession |