Ais an explanation of facts and observations defined by a set of concepts and ideas that organize phenomena.

If there were no system of checks and balance,the process of government would eventually fall apart. do you agree with this opinion? why or why not?

97 points what types of changes have been made in the united states to protect people from earthquakes? a. communities are no longer located along fault lines. b. building codes ensure that structures can withstand shaking. c. warnings go off when an earthquake is expected, and people evacuate the area. d. barriers have been built to prevent flooding by a tsunami.

When zhang qin went to explore west, he brought back stories of