Where does the convection current in the mantle obtain its heat energy? A. Earth’s core and crust
B. Earth’s mantle
C. Earth’s core and mantle
D. Earth’s mantle and crust

Match the leaders with their goals at the yalta conference of 1945. franklin roosevelt winston churchill joseph stalin wanted to prevent future threats from germany wanted free elections in eastern europe wanted soviet against japan

How did inca develop their road system? a) they used mortar to hold the stones together. b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks. d) they laid roads in the cities, not in the less densely populated deserts.

All state and federal officials are required to take an oath to support the constitution. select the best answer from the choices provided t f