Isabel makes an open circuit using a cell, a bulb, and wires. she leaves the ends of two wires free as shown in the picture. she then tests a few objects for conduction by touching them with the ends of the free wires. which item will complete the circuit? a) rope b) screwdriver c) steel fork d) pencil

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.