WED Ecoregions of Texas

The sand dunes in the in the Gulf Coast Prairies and Marshes ecoregion most likely formed by —

• the deposition of sand carried by swift wind blowing along the coast.

• land that slightly uplifted when tectonic plates moved under the beach sand.

• a primitive river that flowed toward the ocean and carved out the sand dunes.

• strong waves dumping chunks of the ocean floor onto the beach.

Which of the following best explains the lack of extremely diverse landforms in this ecoregion?

• The high vegetation decreases erosion from water and wind.

• The trees in this region hide the diverse landforms underneath them.

• The trees broke down all of the previous landforms through weathering.

• The high amount of vegetation soaks up most of the corrosive water into their leaves.

The sand dunes in the in the Gulf Coast Prairies and Marshes ecoregion most likely formed by —

• the deposition of sand carried by swift wind blowing along the coast.

• land that slightly uplifted when tectonic plates moved under the beach sand.

• a primitive river that flowed toward the ocean and carved out the sand dunes.

• strong waves dumping chunks of the ocean floor onto the beach.

This ecoregion is characterized by having a dry climate, poor soil, large numbers of grazing animals, grasses, and oak trees. Which of the following plays the largest factor in the formation of this ecoregion?

• Wildfires and the constant wildlife grazing that erodes the soil

• Winds from hurricanes blowing down trees and weathering the land

• Chemical weathering of limestone and granite

• Flash floods that prevent diverse plant growth

Which Texas ecoregion would most likely have the most evidence of erosion by water?

• Gulf Coast Prairies and Marshes

• Plains

• Prairies

• Plateau & Desert/Montane

Most Texas ecoregions are experiencing accelerated rates of _________ that are changing the natural communities within the ecosystems.

• Weathering

• Erosion

• Deposition

• Land formation

This Texas ecoregion experiences little erosion due to its rich soil with much vegetation where trees are the main plant life.

• Woodlands

• Plateau and Desert/Montane

• Plains

• Prairies

Weathering can have which of the following effects in Texas?

• Sediment reaching the coast

• Building of mountains in west Texas

• Breaking down of rocks such as at Enchanted Rock

• All the above

Deposition can have which of the following effects in Texas?

• Rounding or sharpening of rocks

• Forming of sand dunes at the coast

• Breaking down of rocks such as at Enchanted Rock

• All the above

Erosion can have which of the following effects in Texas?

• Shoreline of the coast to move landward

• Building of mountains in west Texas

• Breaking down of rocks such as at Enchanted Rock

• All the above