Intense explosions from four vents at Stromboli volcano, Italy Saturday, March 5, 2022.Large explosions at Stromboli volcano, Italy Friday, May 13, 2022.Major explosion at Stromboli volcano, significant amount of pyroclastic material, Italy Wednesday, October 6, 2021.Strong explosive eruption at Stromboli volcano, Italy Thursday, May 26, 2022.(GVP)įeatured image credit: Barbara Engele via Volcano Discovery Essentially continuous mild strombolian explosions, sometimes accompanied by lava flows, have been recorded for more than a millennium. The modern volcano has been constructed within this scarp, which funnels pyroclastic ejecta and lava flows to the NW.
The smoke ring menu series#
The active summit vents are located at the head of the Sciara del Fuoco, a prominent horseshoe-shaped scarp formed about 5 000 years ago as a result of the most recent of a series of slope failures that extend to below sea level. The Neostromboli eruptive period from about 13 000 to 5 000 years ago was followed by formation of the modern Stromboli edifice. The small, 924-m-high (3 031 feet) island is the emergent summit of a volcano that grew in two main eruptive cycles, the last of which formed the western portion of the island. Stromboli, the NE-most of the Aeolian Islands, has lent its name to the frequent mild explosive activity that has characterized its eruptions throughout much of historical time. For further information, consult your state's Science Safety Handbook.Spectacular incandescent nighttime explosions at this volcano have long attracted visitors to the "Lighthouse of the Mediterranean." Reading and following the safety precautions of all materials used in an activity is the sole responsibility of each individual. Implementation should be undertaken only in appropriate settings and with appropriate parental or adult supervision. Warning is hereby given that not all activities are appropriate for all individuals or in all situations. In addition, your access to 's website is covered by 's Terms of Service and Privacy Policy. does not make any guarantee or representation regarding such ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information.īy accessing the science activity ideas on, you waive and renounce any claims against that arise thereof. provides science activity ideas for informational purposes only. As the ring travels, air friction slows it down and eventually it blends with the surrounding air and the smoke ring appears to have drifted away. The resulting inward pressure from the surrounding air holds the ring shape together. This is because the air leaving the bottle at the center of the opening is traveling faster than the air leaving near the edge of the hole.Īt the same time, this outcoming vortex is traveling faster than the outside air and therefore has a lower pressure (as depicted by Bernoulli’s principle). The air near the center of the donut rolls out from the center to the edge.
As you can see, you can generate this cool physical phenomenon without smoking a single cigarette!)Ī vortex is a spinning donut of air. It is a ring of air (and smoke) similar to rings sometimes blown by adept cigarette smokers (Note: this is not an encouragement or endorsement of cigarettes smoking at all. How does the air move? In this experiment, you can see how air flies out of the bottle by watching the smoke. It is easiest to see against a dark background.
Use bottles of different sizes to see if there is any difference.Try to "fire at" the tissue balls from different distances and see how far they go.To play, pull out the knot and release it quickly to shoot air at small balls of tissue paper.Tape the balloon onto the bottle so that it doesn't slip off when you pull the knot out.Stretch the cut end of the balloon and cover it over the cut bottom of the bottle.Then cut off about half an inch at the other end of the balloon.Tie a knot at the opening of the balloon (no inflating).Make sure the cut edges are smooth so that they don't poke through and break the balloon.
0 kommentar(er)
