The boundaries of subunits or smaller cratons within the shield are based on topographic expression of different rock types
Indicate whether the statement is true or false
False
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Which of the following is increased by high levels of aldosterone?
A) reabsorption of Na+ and Cl- in the kidney B) reabsorption of Na+ in the kidney and release of Cl- from the kidney C) release of Na+ and Cl- from the kidney D) release of Na+ from the kidney and reabsorption of Cl- in the kidney
What is relief?
A. surface configuration of Earth B. synonymous with elevation or altitude C. difference between highest and lowest elevation D. general term for non-level topography E. fundamental shape of a landform
Complete the concept map by selecting the correct responses from the lists provided. 
Complete the concept map by selecting the correct responses from number 7.
A. 10's of meters B. 1000's of meters C. 100's of meters
What is the name of the species formed when a sodium atom loses an electron?
A) sodate B) sodide C) sodium D) sodium ion