Chain reactions cause more and more atoms to split, leading to a greater and greater release of energy over time. If you wanted to reduce the amount of
energy from the reaction and slow the chain reaction, which of the following
would probably be best?
Select one:
a. Add water to the reaction.
b. Add a substance to the reaction that will absorb and remove neutrons.
c. Add a substance to the reaction that will release additional neutrons.
d. Add oxygen to the reaction.

b. Add a substance to the reaction that will absorb and remove neutrons.

Explanation:

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.