A carbonate stone weathered by water is best described as
A. Dissolved
B. Eroded
C. Rocks wearing away
D. Granite
.
Which of the following is NOT true about sinkholes?
A. They can occur in all types of rock.
B. They need carbonate stone to occur.
C. Human actions like irrigation and drilling can impact sinkholes
D. Most sinkholes aren’t large enough to cause injury
According to the passage, why might porous rock be beneficial to the Earth’s drainage system?
A. A place to store excessive groundwater.
B. Serve as a barrier to keep waterways from changing course.
C. Allow water to pass through it.
D. A shelter for earth’s earliest human beings.
Which of the following BEST describes the author’s main purpose in writing this passage?
A. Sinkholes can occur anywhere, anytime, and effect anybody.
B. Sinkholes destroy lives.
C. Sinkholes are impossible to predict.
D. Sinkholes are natural land formations that are the result of karst terrain.
Use the context clues in the passage to choose the best meaning for porous.
A. Impenetrable
B. Full of holes
C. Weak
D. Strong
According to the map, the region of the United States with the largest concentration of karst terrain is
A. Northeast
B. Southeast
C. Northwest
D. Southwest