Which types of changes must follow the law of conservation of mass? a Both physical and chemical changes
b Neither physical nor chemical changes
c Only physical changes
d Only chemical changes

Which is gerrymandering a problem for the house of representatives but not the senate? a.) members of the house are greatly influenced by their political parties. b.) senators serve longer terms than members of the house. c.) members of the house are more influenced by changes in public opinion. d.) senators are elected in statewide elections rather than in specific districts.