Which of the following elements can exist in more than one form in the same state?
neon
iodine
carbon
iron

Enzymes affect the reactions in living cells by changing the

Displacement is the slope of a velocity vs. time graph a. true b. false

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust