You've slept in, but you really need some breakfast before you
leave the house. Which bread toasts fastest, white or brown?
What you need:
- Slice of white bread
- Slice of brown bread
- Toaster
- Something to spread on your toast - try butter, jam or
honey
How to:
- Put the slice of white bread in one side of the toaster and the
slice of brown bread in the other side of the toaster.
- Every 15 seconds, check the bread. Which one toasts
fastest?
What's happening?
Brown bread normally toasts faster than white bread. There are
two reasons for this:
- Brown bread absorbs more heat than white bread. This heat
toasts the bread more quickly.
- Brown bread contains less water than white bread. Water takes a
lot of energy to heat up, so white bread takes longer to
toast.
Did you find that brown bread toasts more quickly? If you found
that white bread toasted more quickly, it could be that your
toaster is toasting the bread unevenly.
Or perhaps one of your slices of bread is fresher than the
other. Could that affect your experiment?