1. 7th Grade Change in Ecosystems Catastrophic Events, Weathering & Erosion, and Watershed

2. The process of being broken apart by water, air, or ice.
Weathering
Weathering example from Yehliu, Taiwan.
The process of being broken apart by water, air, or ice.
Image from: Definition: Access Science glossary, page 324.

3. Erosion The process of moving rock from place to place. Maine
Image from: Definition: Access Science glossary, page 315.

4. Deposition
The process of building up the surface of Earth by putting down rock.
Formation of a delta
Image from: Definition: Access Science glossary, page 314.

5. Ecoregion
An area defined by its environmental conditions, climate, landforms, and soil characteristics.
The different ecoregions of Texas.
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6. Environment
All the living and nonliving things that surround you or affect you.
Image: Definition: Access Science glossary, page 314.

7. Catastrophic Events
A violent and sudden change in a feature of the Earth.
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8. An overflowing of water onto land that is normally dry.
Flood
An overflowing of water onto land that is normally dry.
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9. Hurricane A swirling storm that starts over the ocean. Hurricane Ivan
Image: Definition: Access Science glossary, page 316.

10. Storm Surge
The swell or crest of surface ocean water created by a hurricane.
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11. Earthquake
A sudden release of energy caused by breaking and moving rock.
Definition: Access Science glossary, page 314.

12. Drought A long period of abnormally low rainfall.
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13. Watershed
An area that is drained by a river and all the streams that empty into it.
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14. Groundwater Water beneath the earth’s surface.
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15. Water that is located at the Earth’s surface.
Surface Water
Water that is located at the Earth’s surface.
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16. Pollution
Contamination of soil, water, or the atmosphere by the release of harmful substances.
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