Question

a power plant needs to slow down the fission reaction in its nuclear reactor. in which direction should the uranium - containing rods in the diagram be moved? left right up down

Explanation:

To slow down the fission reaction, the uranium - containing rods should be moved down. Moving them down increases the amount of neutron - absorbing material that can interact with the neutrons produced in the fission process. More neutrons are absorbed, reducing the number of neutrons available to cause further fission reactions, thus slowing down the overall reaction.

Answer:

down