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Nov 16 Objective
Science Objective for November 16
| Question | Answer |
|---|---|
| Subsidence | The process of sinking to a lower level. As water and gases are squeezed out soft sediment compacts. As sediment compacts subsidence occurs. |
| How does subsidence relate to sea-Level rise? | as globel temperatures rise and land based ice melts, oceans expand, As Ocean volume expands sea level rises globally.they combine to help get to submergence. |
| How has the addition of levees to the Mississippi River's banks contributed to subsidence of the delta? | Levees prevented natural sediment delivery to wetlands in the delta. |
| How does flooding affect wetland plants? | They developed Arenchyma. |
| Arenchyma | Special air-space tissure inside roots called aerenchyma which creates an internal aeration path way that allows oxyggen in the atmoshere to reach the roots. |
| How do hurricanes affect wetlands in a positive manner? | Delivers sediment to costal marshes raising soil elevations. |
| How do some plants survive in conditions with salt water? | Mangroves- salt glands in their leaves which excrete salts onto the leaf surface where they crystallize. |
| Explain why the Louisiana coast is important to the nation? | Supports the largest commercial fishery in the lower 48 states they protect human populations lots of oi 5 of the nations largest ports. |
| How much delta land area has been lost since 1932? | 1,883 square miles |
Created by:
c.culicchia
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