When you remove the air from inside the glass you are creating a difference in pressure compared to the air on the outside of the glass. This means that the inside of the glass "wants" something to fill it up, as your mouth is there it will pull your lips into the glass. The same effect can be seen if you have a half empty glass and try to pull it put of a bowl of water. You will see that the glass will pull some of the water out with it.
The scientific principle behind this can be explain by Boyle's Law which states that "at a constant temperature, the volume of a given mass of gas varies inversely with pressure"
So if you reduce the pressure then you will reduce the amount of space the gas needs therefore something will need to fill that space, i.e. your mouth
There are many but a few are: 1. Vacumm (Best) (Vacumm is actually nothing at all! All the air is sucked out.) 2. Styrofoam 3. Plastic 4. Wood 5. Glass 6. Rubber 7. The material in your clothes
A vent allows for ventilation of air (allowing air in or out).
Air enters the the respiratory tract through either the nose or mouth.
Because the surface temperature of the glass gets colder than the dewpoint temperature of the air. Therefore the relative humidity goes over 100% on the glass causing water vapor in the air to condense into liquid water on the glass.
Some transparent objects are water, air, and clear glass.
Air is sucked into the lungs through the nostrils of the nose or mouth.
Either it has something stuck in its mouth, has to sneeze, or has something stuck in its nose.
A bell jar is a glass dome that can house delicate objects or serve as a vacuum if the air is sucked out.
The function of the pharynx is to transfer food to the mouth to the esphagus and warm, and moiston and filter air before it moves into the trachea.
When you hold the mouth closed then it will spill out, but after you sucked it and put your finger in its mouth... that's a diffrent story. You see the finger traps the air for escaping, which makes the water more active, since its squished toghther.
The air pressure would reduce.
The tornado sucked the car right up into the air. The vortex below those rapids sucked my canoe right out from under me!
A vacuum is a space in which all air has been sucked out.
It will implode.
Cover your mouth with you hands and blow warm air into it for a while and you will be able to let the metal let you tongue go.
Out the muffler.
The pressure inside your mouth is less than the atmosperehic pressure above the glass. The water is pushed through the straw by this difference in pressure.