What happens if the earth was with no water on the surface?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus

Which change will decrease the number of effective collisions during a chemical reaction? a. adding a catalyst b. increasing the surface area c. decreasing the temperature d. increasing the reactant concentrations e. increasing the volume of the reactants