Changes

: The [[experiment]] or [[investigation]] must be designed well to answer the question. You cannot measure the height of a person by counting the number of toes they have. You cannot find out "how many cans will fit in a shopping bag?" if, in your [[experiment]], you put other things in the bag as well, or the cans are all different sizes, that would not be a [[Fair Test|fair test]].

===Examples===

* Experiment: Get 4 pieces of chocolate and wrap each one in the different materials. Place them in a sealed container with crushed garlic inside. Wait for a week and then taste each chocolate.

* Experiment: Pour the same amount of water in 4 cups. Put the same amount of sand, flour, salt and sugar in each one. Stir them each for the same amount of time. If the water is cloudy or the powder sinks to the bottom then it hasn't dissolved. If the water turns clear and the powder can't be seen, then is has dissolved.