The students will complete an inquiry activity using dominoes to determine what variables affect the speed of the chain reaction. Students will have to consider and decide on the best spacing between dominoes to achieve the fastest travel time and ensure the spacing remains constant by carefully measuring the distance between each domino. They will set up 5 dominoes at a time to set off a chain reaction alongside another 5 dominoes space differently. Students can create a bar graph to show how the spacing affects the speed. Students can have fun while learning or reinforcing their understanding of potential and kinetic energy, measuring distance, measuring elapsed time, recording data, making and interpreting graphs and using the distance formula to calculate the rate of speed.