Shaping Texas Ecoregions Quiz

What is weathering?

• Growth of plants

• Formation of soil

• Breaking of rock

• Movement of water

What is erosion?

• Growth of plants

• Formation of soil

• Movement of water

• Breaking of rock

What is deposition?

• Dropping of sediment

• Formation of soil

• Movement of water

• Breaking of rock

Which ecoregion experiences the least erosion due to grasses and tree roots holding soil in place?

• Prairies and Lakes

• Mountains

• Plains

• Delta

What helped form Palo Duro Canyon in the TX Panhandle?

• Deposition of sediment

• Weathering by wind

• Movement of ice

• Erosion of water

True of False? The roots of moss and lichen can break down rocks into pieces.

• TRUE

• FALSE

True of False? The Rio Grande River formed our Texas Delta.

• FALSE

• TRUE

How did the Rio Grande River form a delta?

• Vegetation kept sediments in place eventually leaving the shape of a delta

• The water in the Rio Grande River carried sediments/rocks eventually forming the delta

• A glacier moved all the sediments

What kind of weathering is occurring when Moss and Lichen break down rocks.

• Physical Weathering

• Chemical Weathering

Water seeps into cracks or spaces in rocks, When this water freezes, it expands and eventually breaks the rock in two pieces. What is happening?

• Deposition

• Erosion

• Ice Wedging

• Chemical Weathering