The reason why volcanoes erupt is because of the ___. A. 该说专向因平历民同南天铁需表使特她半国该说专向因平历民同南天铁需表使特她半国pressure inside the Earth该说专向因平历民同南天铁需表使特她半国该说专向因平历民同南天铁需表使特她半国 B. 解并备受解并备受heat from the Sun解并...
B When volcanoes are about to erupt, they show some predictive characteristics. However, until now, there has not been a way to forecast eruptions of more restless vol-canoes because of the constant seismic( 震的) activity and gas and steam emissions (). Carnegie volcanolo-gist Dian a Roman...
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When composite volcanoes erupt , they send huge clouds of ash , dust , smoke , hot gas , and rock into the air . These clouds turn the sky black and rain ash onto the ground . When the cloud becomes too heavy to stay in the air ,it collapses in a...
Four-fifths of Indonesian volcanoes with dated eruptions have erupted in this century. Two of the most devastating volcanic eruptinos in historic time took place in Indonesia: the enormous eruption of Tambora in 1815,- the largest known eruption of the world during historical times,- had such ...
A small island was named Vulcano because of its many volcanoes.Volcanoes erupt(喷发) when the pressure of the magm a beneath the surface becomes too great for the rock above it to contain. At this point, the magm a breaks through the surface —sometimes in a great explosion(爆炸) — ...
Different gases will come out of it. Sometimes a volcano might even change shape. A moving bubble appeared in Mount Saint Helens in 1980. This allowed scientists to predict that it was going to erupt. People moved to the safe places.Many lives were saved.When the first volcano erupted, no...
A shield volcano is a type of volcano usually built almost entirely of fluid magma flows. They are named for their large size and low profile, resembling a warrior’s shield lying on the ground. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted fr...
A dormant volcano is one that hasn’t erupted in the last 10,000 years, however there is a chance it will erupt at some point. An extinct volcano is one that hasn’t erupted in the last 10,000 years and is unlikely to erupt in the future. ...
If that's the case, volcanism could very well be the root cause of Venus' thick cloud cover.And also, we have observed bursts of radio energy from the planet's surface.These bursts are similar to what we see when volcanoes erupt on Earth.So this too suggests ongoing volcanic activity.But...