Calvin can remember quite vividly the first time his dad took him out to learn how to ride a bike, because he didn’t use training wheels and took a nasty spill, scraping his knee badly. This would best be described as a(n)

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air