The answer is: Chao should change the temperature, Mia should adjust the pressure, and Ezra should increase the surface area.
Milk is a liquid, carbon dioxide is a gas and rock is a solid.
The increase in energy will cause the reactants particles to move faster, which will increase their temperature and lead to a faster reaction rate.
The reaction rate is the speed at which reactants are converted into products.
The collision theory states that a certain fraction of the collisions (successful collisions) cause significant chemical change.
The successful collisions must have enough energy (activation energy).
If the surface area and temperature are increased, speed of reaction also increased.
Particles are in constant, random motion and possess kinetic energy, molecules faster and have more collisions.
