Melissa uses bags of mulch that weigh 40 pounds each. she needs to carry 10 bags to her truck. she usually carries one bag at a time. would she do less work if she carried 2 bags at a time?

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods