soap bubble An adjective referring to a dilated, smooth-contoured cyst-like or ballooned, occasionally loculated space(s). Radiologic findings of “punched-out” lytic lesions of bone (e.g., in myeloma, angiosarcoma, ameloblastoma) have been described as soap-bubble-like.Ī descriptive term for the widely open air spaces seen in an abdominal plain film in a gas-producing bacterial abscess.Ī descriptive term for the light microscopic appearance of Pneumocystis jiroveci (formerly P carinii) in tissue.Ī descriptive term for the light microscopic appearance of Cryptococcus neoformans when stained with India ink, which is most prominent in the Virchow-Robin space.Ī descriptive term for the physaliferous cells of chordomas, or epithelial cells in hyperplastic thyroid epithelium. Referring to an expansile, often eccentric, vaguely trabeculated space with a thin, sclerotic, sharply defined margin, which is characteristic of an aneurysmal bone cyst (ABC) other bone lesions with soap-bubble-like expansions include giant cell tumour, osteosarcoma, solitary bone cyst, non-ossifying fibroma, fibrous dysplasia, metastatic malignancy, chondromyxoid fibroma, “combined” stage of Paget’s disease of bone, expansile mandibular lesions of cherubism and metastatic renal cell carcinoma. For these reasons, large bubbles are much more fragile than small bubbles.Soap bubble adjective Referring to dilated, smooth-contoured, cyst-like or ballooned-occasionally loculated-space(s) formally, physaliferous spaces. In addition, the larger bubbles have their own weight to support. This is because larger bubbles have a larger surface area, which means more places for external forces, such as air pressure and gravity, to have an effect. Adding glycerin to the soap solution does the trick by thickening the walls of soap.Īt a certain point, bubbles get too big to hold together. To make bigger and stronger bubbles, we need to prevent the water from evaporating. When the water evaporates, the bubble bursts. Decreasing the strength of the attraction between water molecules lowers the surface tension of the bubble solution, allowing bubbles to form!Īlthough soap makes it possible to blow bubbles, it is still the surface tension of water that holds the bubble together. If you think again about magnets, when two are very close to each other, the pull between them is much stronger than when there is more space between them. It does this by creating space between the water molecules, which decreases the strength of their attraction to one another. Adding soap or detergent lowers the water's surface tension, allowing the surface to stretch and bubbles to form. The surface tension of water is so strong that it prevents us from blowing bubbles from just water. The body of the bubble was much larger, and therefore much more fragile. This is similar to what you experienced with the wand with longer twine. You can make a very long tunnel with a small diameter, but if you try to build a tunnel wide enough for an adult to walk through, it will have trouble supporting its weight. Imagine building a tunnel with LEGO® bricks. Larger bubbles have their own weight to support.

It helps create stronger, bigger, and longer-lasting bubbles.Īt a certain point, however, bubbles get too big to hold together.

The glycerin in the recipe thickens the walls of soap, and as such, makes it harder for water to evaporate. When the water between the soap layers evaporates, the bubble pops. The water layer is what holds the bubble together.

The bubble solution mixture that makes up a bubble's surface is composed of three very thin layers: soap, water, and another layer of soap. As the twine got longer (especially at nine feet), it may have been more difficult to form big bubbles. You probably created some of the biggest bubbles possible, with just a string and some patience! You may have found that it was easier to create the long bubbles with the shorter twine. Pour leftover soap mixture down the drain.

Bubble wand