What is the primary function of dynamic study modules?
assess what a student already knows, and where he or she may want to focus additional study
normalize student learning so the teacher knows what to focus on in lecture
give students real-life applications of the concepts they are currently learning in class
allow students to collaborate with each other on assignments in mastering

Assess what a student already knows, and where he or she may want to focus additional study.

Explanation:

I had this on My Lab and Mastering and got a 100 on the assignment!

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.