Nagativefeedback


 * 1) a light switch- it turns a light on and of
 * 2) a car engine- it turns and starts a car and turns it off
 * 3) phone- turns on and off you apps
 * 4) tv- turns on and off
 * 5) carbon cycle- it is the cycle of life and goes through the cycle
 * 6) body temperature- it turns on and off in you body
 * 7) seasons- they change through the year