The Southwest Region

Which river wore away rock and helped carve out the Grand Canyon?

• Platte River

• Arkansas River

• Mississippi River

• Colorado River

Why are the formations in the Grand Canyon always changing?

• Visitors help carve out the canyon

• Erosion takes place all the time

• The canyon is a national park

• Miners still look for lead there

Which of the following is NOT a cause of the Grand Canyon's continued erosion?

• gravel and sand

• water from the river

• melting and moving glaciers

• wind

What is the reason why the Grand Canyon was made into a national park?

• President Roosevelt wanted to preserve its beauty

• Visitors wanted to float down the Colorado River

• Miners wanted to search the canyon for valuable minerals

• Native Americans still live there

Which is NOT a reason that people might visit the Grand Canyon today?

• Visitors can walk along the canyon edge

• Park rangers can tell visitors about the wildlife

• Visitors can see gold from the side of the canyon

• It is exciting to hike into the canyon on one of the trails

Which is TRUE about the climate of the Southwest?

• There is a lot of snow

• The entire region is a desert

• The climate is the same in the whole region

• It has a varied climate with different temperatures and precipitation

Which of the following climates can NOT be found in the Southwest?

• arid

• hot and humid

• humid and windy

• dry and snowy

What is a desert?

• an area that gets less than 10 inches of rainfall each year

• an area with wetlands and forests on the coast

• an area with a warm, humid, tropical climate

• an area where warm and cold air masses meet

Which is NOT a way the saguaro cactus has adapted to little rainfall?

• It spread its long, shallow roots to drink the rainwater

• Its trunk and branches expand to store water

• It has white, night-blooming blossoms.

• It can store enough water to live through long, dry periods

Which is a way that the saguaro helps desert wildlife?

• Saguaros provide shelter for many animals

• Many birds live in holes near saguaros

• Animals eat the saguaro

• The saguaro spreads its roots to drink rainwater