6th Six Weeks Review

A flood will have a greater effect on a habitat than a heavy rainfall event because a flood -

• is followed by strong winds that greatly affect a habitat.

• strikes more quickly, not allowing organisms to migrate.

• brings salt and other substances that harm plants.

• happens more often and lasts much longer.

A diagram of the areas surrounding the Gulf of Mexico is provided. A hurricane that comes in from the Gulf of Mexico will most likely have which of the following effects on a Texas habitat?

• Plants on Goose Island are killed by a surge of salt water.

• Trees in and around Austin are uprooted by heavy winds.

• Birds that eat fish on Galveston Island become extinct.

• Rains create new marshland habitats in Brazos Bend.

Tornadoes are catastrophic events that create change in ecosystems in which of the following ways?

• Heavy flooding increases areas where trees can grow.

• High winds damage areas of important plant life.

• Wildfires started by lightning reduce carbon dioxide.

• Saltwater kills many ground-dwelling animals.

What change would most likely be observed in the nonliving parts of an ecosystem after a hurricane?

• Taller sand dunes on the beach

• Increase in oxygen in the atmosphere

• Less sunlight reaching ground level

• Higher levels of soil nutrients

The extremely strong winds associated with a tornado will have the greatest negative effect on which of the following kinds of organisms?

• Fish that feed around coral reefs

• Smaller mammals that burrow underground

• Birds and other animals that use trees for shelter

• Organisms that feed on decaying plants and animals

Which of the following maps, each of an area of approximately 300 square kilometers, best shows the damage caused by a tornado?

• 
• 
• 
• 

From the distinct shapes of sand dunes and their features in a desert, a geologist could most likely determine which of the following?

• Direction of the prevailing wind

• Daily high and low temperatures

• Amount of water nearby

• Age of the formations

The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico?

• Post Oak Savannah

• Blackland Prairies

• Edwards Plateau

• Gulf Prairies and Marshes

The Gulf Prairies and Marshes ecoregion experiences significant soil erosion. One would expect the climate in this region to be –

• dry and hot.

• cold and snowy.

• wet and rainy.

• warm and humid.

The tall rock formations with smooth surfaces in Big Bend National Park were formed over time by -

• rock deposition.

• water erosion.

• local vegetation.

• wind weathering.