What was gunpowder initially used for in china during the middle ages?
a) measuring time
b) creating fireworks
c) conducting trade
d) recording texts
e) traveling overseas

How does cooperative federalism work in the united states? a. state and federal governments have different and overlapping responsibilities b. branches of the federal government can check one another's power. c. when amending the constitution, citizens vote directly. d. bills passing the house of representatives must also pass the senate.