Advances in technology affected manufacturing in the North and farming in the South. Read about how America turned from a country where most products were made in the home to an economic power that used factory production.

This site, which is provided for by the University of Massachusets, gives a very good example of a typical bivalve reproductive cycle.

[Free Registration/Login may be required to access all resource tools.] Students explore mass relations between reactants and products for a given chemical process, and practice balancing chemical equations.

The core of this lesson is about the power of mass production. Students will first assemble a product individually, then work in teams to design, build, test, and redesign an assembly line whose product must meet quality control...

Although Eli Whitney was born in Massachusetts, it was in Georgia that he invented the cotton gin in 1793.

Briefly describes the shift in offices from male to female clerical workers. Details the progression of women in going from clerical positions to managerial positions.

Because atoms are neither created nor destroyed in a chemical reaction, the total mass of products in a reaction must be the same as the total mass of the reactants.