The Davis Mountains in West Texas used to be taller than they are now. Which of the following conditions most likely caused the mountains to become shorter over time?

These 750+ 5th Grade science questions have been taken from the following state and regional science exams in the United States: AIMS-Arizona's Instrument to Measure Standards, Alaska Department of Education & Early Development, California Standards Test, MCAS-Massachusetts Comprehensive Assessment System, Maryland School Assessment, MEA-Maine Educational Assessment, MEAP-Michigan Educational Assessment Program, NAEP-National Assessment of Educational Progress, North Carolina End-of-Grade Assessment, New York State Educational Department Regents exams, Ohio Achievement Tests, TAKS-Texas... Show more

These 750+ 5th Grade science questions have been taken from the following state and regional science exams in the United States:
AIMS-Arizona's Instrument to Measure Standards, Alaska Department of Education & Early Development, California Standards Test, MCAS-Massachusetts Comprehensive Assessment System, Maryland School Assessment, MEA-Maine Educational Assessment, MEAP-Michigan Educational Assessment Program, NAEP-National Assessment of Educational Progress, North Carolina End-of-Grade Assessment, New York State Educational Department Regents exams, Ohio Achievement Tests, TAKS-Texas Assessment of Knowledge and Skills, Virginia Standards of Learning, & Washington MSP. 

Note: Some of these questions were asked at the 3rd grade and 4th grade levels.
 

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