5. A reaction in which them material that starts the reaction is also one of the products and can start another reaction is called a. An accelerator reaction
b. A moderator reaction
c. A shielding reaction
d. A chain reaction

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

What is the mass of sodium in 3 moles of sodium chloride

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this