How Long Can Fresh Milk Last For After Its Expiry Date?
Idea: How long will fresh milk last for after its expiry date?
Aim: To determine what conditions help increase the likelihood of different types of fresh milk going off after the provided expiry date.
Background Information:
Full-Cream milk has on average 3.8% fat.
Lite milk has less than 1.5% fat unless otherwise specified.
Skim milk has less than 0.15% fat.
No fat milk has less than or equal to 0.1% fat.
Milk is detected as mouldy, spoiled and inedible when it smells bad and when swirled, it does not mix or blend well.
Hypothesis: The more properly milk is contained in the refrigerator, the longer it lasts or the safer it is to be used, meaning if milk is placed in room temperature and/or near the sun, the faster it spoils.
Method:
Independent variables: …show more content…
Different conditions: room temperature (no sun), in the fridge at 4 degrees Celsius and under the sun.
Dependent variables: time each milk lasts after its expiry date.
Controlled variables:
The same amount of unopened milk* for each type: 1L
The same milk brand but different versions: Dairy Farmers
The same date of expiration on the milk cartons: 14/03/2018
The storing conditions of the milk before the experiment starts: in the fridge at 4 degrees Celsius.
* Unopened milk means the lid of the bottle containing milk is always closed before the investigation begins to increase the validity of the experiment.
Step 1: On the date of expiration of the milk, place the different cartons of milk next to one another in the same area: in a room with windows kept open 24/7 and exposure to the sun during daytime.
Step 2: Repeat the same procedure for another set of milk in an another area: all the cartons are to be put in an empty fridge at 4 degrees Celsius.
Step 3: Examine the milk every day to identify any phenomena happened to the milk as well as the milk carton.
Step 4: Record the date when the milk is detected as
Aim: To determine what conditions help increase the likelihood of different types of fresh milk going off after the provided expiry date.
Background Information:
Full-Cream milk has on average 3.8% fat.
Lite milk has less than 1.5% fat unless otherwise specified.
Skim milk has less than 0.15% fat.
No fat milk has less than or equal to 0.1% fat.
Milk is detected as mouldy, spoiled and inedible when it smells bad and when swirled, it does not mix or blend well.
Hypothesis: The more properly milk is contained in the refrigerator, the longer it lasts or the safer it is to be used, meaning if milk is placed in room temperature and/or near the sun, the faster it spoils.
Method:
Independent variables: …show more content…
Different conditions: room temperature (no sun), in the fridge at 4 degrees Celsius and under the sun.
Dependent variables: time each milk lasts after its expiry date.
Controlled variables:
The same amount of unopened milk* for each type: 1L
The same milk brand but different versions: Dairy Farmers
The same date of expiration on the milk cartons: 14/03/2018
The storing conditions of the milk before the experiment starts: in the fridge at 4 degrees Celsius.
* Unopened milk means the lid of the bottle containing milk is always closed before the investigation begins to increase the validity of the experiment.
Step 1: On the date of expiration of the milk, place the different cartons of milk next to one another in the same area: in a room with windows kept open 24/7 and exposure to the sun during daytime.
Step 2: Repeat the same procedure for another set of milk in an another area: all the cartons are to be put in an empty fridge at 4 degrees Celsius.
Step 3: Examine the milk every day to identify any phenomena happened to the milk as well as the milk carton.
Step 4: Record the date when the milk is detected as