Earth's Environment

2. - The process of migration of new species into an ecosystem after a disruptive event.
3. - in a community of plants and animals that have common characteristics for the environment they exist in.
5. - when a species of plant or animal no longer exist in the biosphere due to human or global stress.
8. - a scale of tornado severity with numbers from 0-6, based on the degree of observed damage.
10. - Natural phenomenon with lasting negative impact on the Earth's environment, usually resulting from interior processes, or severe weather.
11. - the capacity of an ecosystem to respond to a perturbation or disturbance by resisting damage and recovering quickly.
12. - A wave motion in a solid medium where the medium moves perpendicular to the direction of the travel of the wave; vibrate at right angles to the direction of the seismic wave.

1. - relationship in which two organisms are mutually dependent on each other for survival.
4. - the number of different species of plants and animals in an area.
6. - the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other plants) occupied by living organisms.
7. - a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
9. - A numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations.