How Temp affects rate of react

In this investigation I am trying to find out how the temperature of water affects the reaction rate between amylase and starch.The thing that I am going change are the temperature of water, which are 10° C, 20° C, 30° C, 40° C, 50° C. The things I will measure are the colour of the mixture in the present of iodine each minute until it stays a constant brown.I researched this information in a previous lesson in which we did the experiment at one temperature and timing the amount of amylase to break down the starch.Amylase, a carbohydrase found in saliva, works best in slightly alkaline conditions at a pH of about 7.5.I think this information applies to everyday life because it gives us the information about what temperature starch is used in our body.
I predict that the 40°C experiment will be the fastest to breakdown the starch into sugar.The scientific reasons why I think this might be is because 37°C is our bodies temperature and analyse is a biological enzyme in our body so it would work best at 37°C.However, as I do not know how amylase will react at a higher temp and I know that any temp below around 40°C works slower so I think that it will be faster at the highest temperature.
2) Fill beaker with 200ml water at the specified temperature
3) Put 5ml starch, 1ml amylase into test-tube and place in water
5) While waiting for 1st minute fill spotting tile with iodine
6) At the each minute interval fill one spot to see colour using pipette
7) Repeat until colour does not change
8) Try again for different temperatures
I will take measurements every minute. I will make them accurate by carrying out t

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