not have the money to buy these spare parts and the protection devices get bypassed. In these cases, suction pumps operate with no protection device to prevent fluid from getting to the motor. IMAGINE: What ideas do you have for reaching your goal? Which ideas do you think will be the most effective? Example answer: Water will enter the protection device and the rising water will make an object float that will block off the tubing to the motor. The challenge is creating a good seal between the tubing and floating object, using a ping pong ball, Silly Putty®, balloon, etc. PLAN: What materials do you want to use? How do you plan to assemble your device? Draw a sketch of your plan below; label the materials. Example answer: Possible materials: ping pong ball, plastic egg, wooden ball, pipe cleaners, wooden craft sticks, balloon, putty, hot glue CREATE: Carry out your plan and test your prototype protection device on the suction pump. IMPROVE: Did your protection device work? If not, why? Keep making changes to your design until you create a device that completely stops the fluid from getting to the motor. Record the changes you made with each redesign and how they affected the results. Improvement Results
not have the money to buy these spare parts and the protection devices get bypassed. In these cases, suction pumps operate with no protection device to prevent fluid from getting to the motor. IMAGINE: What ideas do you have for reaching your goal? Which ideas do you think will be the most effective? Example answer: Water will enter the protection device and the rising water will make an object float that will block off the tubing to the motor. The challenge is creating a good seal between the tubing and floating object, using a ping pong ball, Silly Putty®, balloon, etc. PLAN: What materials do you want to use? How do you plan to assemble your device? Draw a sketch of your plan below; label the materials. Example answer: Possible materials: ping pong ball, plastic egg, wooden ball, pipe cleaners, wooden craft sticks, balloon, putty, hot glue CREATE: Carry out your plan and test your prototype protection device on the suction pump. IMPROVE: Did your protection device work? If not, why? Keep making changes to your design until you create a device that completely stops the fluid from getting to the motor. Record the changes you made with each redesign and how they affected the results. Improvement Results