Changes

To '''observe''' is to use our senses to study something very carefully or use a tool to measure something. We might [[Sight|watch]] and [[Hearing|listen]] and if it is safe then we might [[smell]] or even [[touch]] something to observe it. We might also use a [[ruler ]] to [[measure ]] the [[length ]] of something or a [[timer ]] to [[measure ]] how long it takes for something to happen.