Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it. As the magma rises, bubbles start to form from the gas dissolved in the magma. The gas bubbles exert tremendous pressure.

Children’s teeth begin forming before birth. The first baby teeth that come into the mouth are the two bottom front teeth. You will notice this when your baby is about 6-8 months old. Next to follow will be the four upper front teeth and the remainder of your baby’s teeth will appear periodically. They will usually appear in pairs along the sides of the jaw until the child is about three years old. The pace and order to their eruption also varies.

If you want to know the information about eruption time of permanent teeth, please refer to "Types of teeth" of "Knowing your teeth"

There are several ways to tell. Near the June Lake Junction a glacial moraine sits on top of a volcano, which tells us that the volcano is older than the glaciation that created the moraine. Panum Crater and a few of the other Mono Craters have no lake terraces on their flanks, which tells us that they are younger than Mono Lake's high levels 13,000 years ago. Black Point has these terraces and tufa at its top, which tells us it is as old or older.

about 6 months, the two lower front teeth (central incisors) will erupt, followed shortly by the two upper central incisors. The remainder of the baby teeth appear during the next 18 to 24 months but not necessarily in an orderly sequence from front to back. At 2 to 3 years, all of these 20 primary teeth should be present.

No, and geologically there is no reason to expect one to appear. There is evidence, however, of multiple ash falls from ancient volcanoes preserved in rocks of Cambrian, Ordovician, and Devonian age in outcrops in eastern West Virginia and in the subsurface in the western part of the State, and in a flint clay in the Hernshaw coal bed of Middle Pennsylvanian age (Kanawha Formation) in southern West Virginia.

Volcanoes come in a variety of shapes and produce a related variety of lavas, depending on levels of stickiness, or viscosity. The kind of volcanic rock they produce depends largely on the proportion of silica within the the lava. The less silica the lava contains, the less viscous the lava. The less viscous the lava, the easier it is for the volcanic gases that brew up in the magma to escape from their surrounding solids. Low viscosity produces honey-like lava, which flows easily from a crater.

The turn off to the Mud Volcanoes is 38 km (check on GPS and include GPS map) short of Hingol River and is marked by a small blue sign (about 1 foot wide) saying “Sapt Post”. The color on the sign board will vary, but the road will take you straight to the coast guard camp at Sapt. Turn off the road at this sign towards the sea and follow the tracks. Here, a saying goes, “all tracks lead to Chandra Gupt.

Volcanoes are a natural way that the Earth and other planets have of cooling off. Planets are warm in their mantles. Heat inside planets escapes towards their surfaces. For reasons that are not well understood, heat sometimes melts rocks, which then rise buoyantly toward the planet's surface. When the hot rocks - called magma - and included gases break through the crust, an eruption occurs. The buildup of ash and lava flows around the eruption hole (or vent) makes a volcano.

The absolute number of volcanoes that exists depends on your definition: active only, active, dormant plus extinct volcanoes? And even if we decide on a definition, nobody has really counted all of the volcanoes, especially the tens on thousands on the sea floor. The best guess is 1511 volcanoes have erupted in the last 10,000 years and should be considered active.

All of the Hawaiian Islands are made from several volcanoes ranging from a few feet above sea level to the tallest volcano in the islands, Mauna Kea on the Big Island of Hawaii which stands 13,796 ft above sea level (plus another 18,000 feet below sea level!). Another tall volcano located on the Big Island is Mauna Loa which stands 13,680 ft. Because of erosion (after a million years of rain, wind and waves) some volcano craters are only a hundred feet above sea level.

FALSE : This is false as there is no direct relation at all , this is commonly beoeived due to the simple fact that , as one reaches the age of 50 , simultaneously the teeeth and eye problems can start creeping up due to maturity , how ever , one must under stand that , this is pure co -incidence and natural result of the ageing process. There is ample proof that , no one has gone blind by getting all the teeth removed.

Yes. If there is a playing piece next to the cone or volcano (that means on a flanking site on the same era card) you can "erupt" it. This forces the playing piece back. Back to the top

Alaska contains over 100 volcanoes and volcanic fields which have been active within the last one and a half million years. There are more then 70 potentially active volcanoes in Alaska. In the 1980's one morning of April 1st Sitka, Alaskans woke up to black smoke billowing out of the dormant volcano, Mt. Edgecombe; people were in a panic. The biggest joke had just been played on a whole town.

Call the USGS Cascades Volcano Observatory in Vancouver, Washington, at (360) 696-7693; the URL is http://vulcan.wr.usgs.gov.

Most of the Earth's volcanoes are located around the Pacific Ocean because that is where most of the Earth's subduction zones. A subduction zone is a place where one plate of oceanic lithosphere (= the crust + uppermost mantle) is shoved under another plate. The down going plate eventually starts to melt, and the material rises up to erupt through the overlying plate. If the overlying plate is a continent, you get a chain of volcanoes such as the Andes or Cascades.

Shield volcanoes--the largest of all volcanoes on Earth (not counting flood basalt flows). The Hawaiian volcanoes are the most famous examples. These volcanoes are mostly made up of basalt, a type of lava that is very fluid when erupted. For this reason these volcanoes are not steep (you can't pile up a fluid that easily runs downhill).