Posts by SallyAnn
Total # Posts: 3
What are the three major types of chemical bonds?
What is the term for the movement of people from rural to urban due to changes in farming, a soaring population, and an ever-increasing demand for industrial workers?
who was the all-around genius of the Renaissance period whose sketches of submarines, parachutes and flying machines were yearh ahead of their time? His mos popular painting was the Mona Lisa?