I think the silicone bag will be the best bag out of all the tests because of the material it is made out of.

Food Preservation Tests: I think the silicone bag will also perform the best in the food preservation test because the seal is strong and locks in the freshness of the bread and the moisture in the bag.

Durability Tests: I think the silicone won’t have any holes in the puncture test because it is strong and flexible. I think that the silicone bag will leak from the seal in the leaks test., but otherwise, I think it will be the best because it won’t pop, and I don’t think water will seep through the bag.

SustainabilityTest:  You can use them over and over again. I think silicone bags last longer than any other bag because they are made out of a very strong material.

• Made from 100% polyester with embedded TPU for waterproofing;
• Polyester is a man-made fabric made from petroleum, water and air
• Opaque it had a pattern 
• It had a zipper seal 
• Designed for sandwiches and snacks like goldfish and fruit  
• It is recyclable but not at all recycling centers 
•  Can be reused if washed
• It takes 100s of years
• It breaks into microplastics
• Made of 100% cotton and coated in beeswax inside and out
• Opaque, patterned fabric
• Sticky and hard
• Self seal once top is folded 
• BPA and plastic free
• Designed for dry snacks like goldfish and nuts
• It can be reused if washed
• It's recyclable and compostable 
• Silicone is man made 
• Blue thick silicone zip seal
• BPA-free
• Designed for 
• sandwiches and snacks

•  Made from translucent  Polyethylene Vinyl Acetate (PEVA)can be reused many times if washed

• It is recyclable but not at all recycling centers 
• It can't be composted and is not biodegradable
• starch (like potatoes) and cornstarch 
• It has a green seal
• Green coloured translucent  bag 
• Designed for sandwiches and snacks 
•  Single use or can be reused depending what you put in the bag 
• Compostable commercial composting centre (not backyard compost)
•  Decomposes within a year 
• Made from thicker translucent polyethylene plasticBlue and pink plastic zip seal 
• Free from BPA or phthalates
• Designed to protect food from cold temperatures in freezer
• Single use or can be reused depending what you put in the bag 
• Recyclable at store drop off
• It takes up to 1000 years to decompose    

• Made from thin transparent plastic (Low density polythene)
•  Green plastic zip seal 
• Free from BPA or phthalates
• Designed for sandwiches and snacks 
• Single use or can be reused depending what you put in the bag 
• Recyclable at store drop off
• It takes about 1000 years to decompose  

1. Place one slice of Cobbs bread in each bag type
2. Seal bags tightly
3. Place all the sealed bags on a tray and leave in cupboard
4. At 5:30 pm each day check the bread in each bag
5. Take a photo of each piece of bread (every second day)
6. Do not contaminate the slices of bread (use tongs, wash hands between)
7. Record observations using rating scale in chart and repeat for 7-10 days

1. Place 5 grapes in each bag 
2. Seal bags tightly
3. Place all the sealed bags in tray in the refrigerator
4. At 5:45 pm each day check the grapes and remove each bag from fridge. 
5. Remove 1 grape from bag
6. Do not contaminate the grapes (use tongs, wash hands between observations)
7. Record observations using rating scale in chart and repeat for 7-10 days

1. Pour 100 ml of water into the bag.
2. Close and seal the bag.
3. Set timer fo 30 seconds
4. Turn the bag upside down over a tray
5. After the 30 seconds pour the water in the tray into a graduated cylinder
6. Record observations
7. Pour remaining water out of the bag
8. Repeat steps 1-4, but this time squeeze the bag with two hands firmly
9. After the 30 seconds pour the water in the tray into a graduated cylinder
10. Record observations
11. Repeat test with other bags

1. Add 5 pins and 5 thumb tacks to the sandwich bag
2. Seal the bag tightly
3. Place the bag on the counter 
4. Press on the bag to see if the sharp items poke through
5. Shake the bag very hard and fast for 15 seconds
6. Remove pins and thumb tacks
7. Check the bag for hole and tears
8. Fill bag with water
9. Observe if water is leaking through small holes or tears
10. Repeat this test other bags

• The silicone bag kept bread fresh the longest. Although it grow mold but not until Day 7
• All bread in the bags with strongest seals molded because moisture was trapped in the bags. 
• The bags with strong seals preserved the grapes the best
• The Beezwax and fabric bags dried out the bread because of the their weak seals and air got in through the material
• The fabric, beezwax and silicone are the most durable and can be reused over and over again
• The material of a snack bag matters because plastic bags are harmful to the environment
• Silicone bags are a better choice than plastic for the environment because they last longer, can be recycled but not composted
• The Beezwax bag and compostable bags are good for the environment but are not as durable and do not keep food fresh for long

• The silicone bag kept bread fresh the longest. Although it grow mold but not until Day 7
• All bread in the bags with strongest seals molded because moisture was trapped in the bags. 
• The bags with strong seals preserved the grapes the best
• The Beezwax and fabric bags dried out the bread because of the their weak seals and air got in through the material
• The fabric, beezwax and silicone are the most durable and can be reused over and over again
• The material of a snack bag matters because plastic bags are harmful to the environment
• Silicone bags are a better choice than plastic for the environment because they last longer, can be recycled but not composted
• The Beezwax bag and compostable bags are good for the environment but are not as durable and do not keep food fresh for long

In my experiment the silicone bag stood out over all of the other bags.

 In the food preservation tests, the silicone bag kept the bread fresh the longest locking in the moisture and prevent mold growth. It kept the grapes good but not the best. 

In the durability tests the silicone bag out ranked all of the other bags because of its strong and flexible material and its airtight seal. 

Because the bag is so durable it can be used over and over again for years which means less waste in our environment. It is somewhat recyclable but it is not biodegradable.    

This is important to know as you need to know which type of bag will keep your food fresh without going moldy. Food today costs a lot and people need to be able to have their food last as long as possible. It is also important that people know which bag is best for the environment as we don't want to be adding garbage to our landfills. 

• I think my experiments and tests were mostly fair. 
• In each test I kept my controlled variables the same as much as I could. However, 
• I could not accurately control how long the bread was out of the bag each day when I observed it
•  there may have been some contamination between the pieces of bread. 
• All my test were only done once so I am unsure if my results are always the same 
• In the puncture test it was hard to control how hard I was shaking the bags
• I did not repeat this test many times
• The sustainability tests were only based on my knoweldge and research not a experiment

Science Learn https://www.sciencelearn.org.nz/resources/1543-measuring-biodegradability

Ziploc Website https://ziploc.com/en-us/products/bags/sandwich-snack/sandwich-bag  

Wikipedia

Ziploc

Amazon Dcsioike Silicone Bags, Beeswax Wrap Storage Bag by BeeBAGZ

Green Match https://www.greenmatch.co.uk/blog/is-silicone-bad-for-the-environment 

Center for Biodiversity

https://www.biologicaldiversity.org/programs/population_and_sustainability/sustainability/plastic_bag_facts.html#:~:text=It%20takes%201%2C000%20years%20for,continue%20to%20pollute%20the%20environment. 

Study.com https://study.com/academy/lesson/bread-mold-experiment.html#:~:text=When%20the%20conditions%20are%20favorable,diverse%20the%20mold%20species%20is. 

I want to thank my mom for helping to buy everything I needed and give me encouragement to keep adding more information.