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Marshmallows are mostly air puffed sweetened Gelatin. When the air pressure outside of the mallow goes down, the air inside begins to expand. The further out of equilibrium it goes, the larger the mallow will expand until all of the air inside has escaped.

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Why do marshmallows expand in the microwave?

Marshmallows expand in the microwave because the heat causes the air bubbles trapped inside them to expand, making the marshmallows puff up and increase in size.


What does air pressure do to marshmallows in a bottle?

When marshmallows are placed in a bottle and the air pressure is reduced (such as when a vacuum is created), the marshmallows expand. This occurs because the lower pressure allows the air trapped within the marshmallows to expand, causing them to puff up. Conversely, when normal air pressure is restored, the marshmallows will return to their original size as the air inside them is compressed. This demonstrates the relationship between air pressure and gas expansion within objects.


I need to expand my bedroom storage. How do those vacuum storage bags work?

Vacuum storage bags work by shrinking the size of whatever you put in them. They are extremely efficient.


Do marshmallows expand or dissolve when eaten?

No, marshmallows begin to break down by amylases in saliva. And, in the stomach, gastric juices further break down the sugars in marshmallows to dissolve them down. So, marshmallows don't expand, they liquify in the stomach.


If you put marshmallows in a oat biscuit recipe would it work?

What are you trying to make? You can put marshmallows in most anything and that is what you will have. Marshmallows in a biscuit. I can't believe this would make a good finished product, but I'm not the one eating it.


Can you put marshmallows in brownies for a gooey and delicious twist?

Yes, you can add marshmallows to brownies for a gooey and delicious twist.


How can you take two marshmallows to the moon?

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What is it called when you put marshmallows it on put it in a fire?

When you put marshmallows in a fire, it is often referred to as "toasting" or "roasting" marshmallows. This popular activity typically takes place during camping trips or outdoor gatherings, where people skewer marshmallows on sticks and hold them over an open flame until they become golden brown and gooey. Roasted marshmallows are commonly used to make s'mores, a sweet treat that combines them with chocolate and graham crackers.


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How does air get into a marshmallow to make it bigger?

Air does not necessarily go into marshmallows to make them expand. In fact, marshmallows are already full of air in tiny bubbles. There are two mechanisms that cause marshmallows to expand, both resulting from an imbalance in the pressure inside these bubbles compared to that of the atmosphere. The first way would be if the marshmallow is placed inside a vacuum, or any other low pressure environment. Because there is a fixed amount of air in the bubbles (from when the marshmallows were made), when the external pressure pushing against the outside of the marshmallow decreases, the air inside the marshmallow will expand so that its pressure is equal to that of its atmosphere. The other mechanism is perhaps more familiar, and that is in a microwave. What happens is that when the microwave heats the water in the marshmallow, it warms the air and the sugary goo around it. This causes the air to expand. This is like what happens when you bring balloons into a heated building during winter- the heat causes the air molecules to move faster, and bump into the sides of the container with more force, therefore pushing outward. Again the pressures inside and outside must equal each other, so the bubbles in the marshmallow expand. Furthermore, when the sugar is heated, it becomes more pliable, which allows the air to expand more easily.


How does an egg suck into a bottle when you put 3 matches in it?

The matches burn up the oxygen, removing it. This causes a vacuum, which pulls the egg in. Also the heat from the matches expand the air in the bottle. Once they have gone out, the air cools and contracts, causing a vacuum and pulling the egg in.