How to Make the Perfect Toast (Design Lab)

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Research Question To investigate the amount of time a piece of bread stays in the toaster (60-300 seconds) on the texture and colour of the toast by testing how easily the toast crumbles and observing the colour of the toast, when the adjustment knob on the toaster is set on the median.

Independent variable: Time (in seconds) the bread spends inside the toaster.
Dependent variable: Texture and colour of the toast
 Background information and hypothesis
Slices of bread are often soft, and therefore it is common for bread to be toasted in order to be crispier. Slices of bread are put into the toaster, and one must adjust the settings on the toaster depending on how crispy or brown they want their bread. The slice of toast pops out when it is ready. Butter or jam is usually spread on the toast and then eaten. The longer the slice of bread stays in the toaster, the crispier and more brown in colour it gets. 
 Variables
Independent variable: Time (in seconds) the bread spends inside the toaster.
This will be measured from 60 seconds to 240 seconds, with 60-second intervals between each trial. A stopwatch will be used to accurately measure the length of time spent inside the toaster.

Dependent variable: Texture and colour the bread.
Texture will be measured by observing how crispy the toast is, and how easily it crumbles. The colour will be observed visually and it is expected that the longer the bread stays in the toaster, the more brown the toast will become.

A table showing the controlled variables of the experiment. Variables Method of controlling Reason for controlling 1) Thickness of bread slices 1) Buy pre-sliced bread instead of full loaves, since the former are sliced equally in advance. 1) Thicker slices of bread may need a longer time to toast, whereas thinner slices a shorter time. This would be a great limitation to the experiment. 2) Make sure the

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