Why do volcanoes explode

Also, saw and felt the differences between the types of lava. And in the end, they made conclusions! They made so many predictions, observations, and connections! Most groups had discovered the reason for exploding volcanoes through the labs and were exceptionally excited when the video confirmed their conclusions. Very engaging I liked that it was hard to blow the thick lava and they were able to feel the pressure and the big release.

It was also easy prep! Trying to make a mountain with both lava gave them the physical explanation of how volcanoes are formed from the different types of lava. My students and I love Mystery Science! They worked enthusiastically with their partners and were able to differentiate how the bubbles were easily blown or not, linking the task to comparison of shield or cone volcanoes. It was an awesome lesson! They were definitely interested in the extra activity as well.

Thanks much! They think back to Mystery 1 and say, "So a volcano really could pop-up in my backyard! Was great for students to connect WHY they were blowing the bubbles with the clear video of what the bubbles were doing in a volcano.

Solidified the ideas, but the videos were so clear! I know students will go home and describe this for their parents. Thank you! Even I thought at first that the thin lava came out of the cone volcano! Great exploration. Easy, cheap materials to obtain and prep and most of all the kids had fun and understood the concepts. My students were able to identify the 2 types of volcanoes and lava rocks lava rock samples not included.

The only thing that would have made this lesson extraordinary is if somehow Mystery Science sees fit and provide a science kit with some samples and a few hands on items for your subscribers to purchase, for these young minds.

They are too young to have experienced Mt St. Helens blow. They were very engaged in the lesson. Also, there was a clear understanding between putting the lava on the plate and seeing the shape that gets formed. Very concrete and clear!! The videos that accompany the experiment explain things perfectly. My kids loved this experiment! I had a lot of WOW's.

Everyone enjoyed it and learned a lot. Thank you!! I appreciate the ease of getting the materials together, and they model really helped them see why the volcanoes explode differently! They went into it with a misconception of doing the "vinegar" experiment they all know to knew learning and understanding. I loved the interactive component to work with the video and that the supplies for the experiments and the worksheets were easy to find and work with.

The answers to the assessment questions were well written and the answers having both easy and complex answers helped grade! Love this so far! Some of them managed it! They worked better in pairs this time, too, something we've work on all year. The content is very engaging, which seems to promote the cooperation and exchange of ideas. I learned volcanoes can explode in space. We liked seeing the difference between what Mt.

Helen looked looked like before and after the explosion. I learned how rocks get moved from one place to another. However, the ending video really helped clarify and answer their questions. Good learning experiment! Many said they'd continue experimenting at home, which this teacher loves to hear. It was fun blowing bubbles into them. It was really informative and fun!

It ios so much fun for the kids and for myself. These lessons are so amazing. There are a few historic examples of simultaneous eruptions from volcanoes or volcanic vents located within about 10 kilometers 6 miles of each other, but it's difficult to Filter Total Items: Year Published: When volcanoes fall down—Catastrophic collapse and debris avalanches Despite their seeming permanence, volcanoes are prone to catastrophic collapse that can affect vast areas in a matter of minutes.

Siebert, Lee; Reid, Mark E. View Citation. Siebert, L. Geological Survey Fact Sheet , 6 p. Stovall, Wendy K. Stovall, W. Geological Survey Fact Sheet —, 6 p. Year Published: update to the U. Geological Survey national volcanic threat assessment When erupting, all volcanoes pose a degree of risk to people and infrastructure, however, the risks are not equivalent from one volcano to another because of differences in eruptive style and geographic location. Ewert, John W. Ewert, J. Geological Survey national volcanic threat assessment: U.

Geological Survey Scientific Investigations Report —, 40 p. Year Published: U. Geological Survey Volcano Hazards Program—Assess, forecast, prepare, engage At least volcanoes in 12 States and 2 territories have erupted in the past 12, years and have the potential to erupt again. Geological Survey Fact Sheet —, 4 p. Year Published: A sight "fearfully grand": eruptions of Lassen Peak, California, to On May 22, , a large explosive eruption at the summit of Lassen Peak, California, the southernmost active volcano in the Cascade Range, devastated nearby areas and rained volcanic ash as far away as miles to the east.

Clynne, Michael A. Clynne, M. Year Published: Eruptions of Hawaiian volcanoes - Past, present, and future Viewing an erupting volcano is a memorable experience, one that has inspired fear, superstition, worship, curiosity, and fascination since before the dawn of civilization.

Tilling, Robert I. Year Published: Eruptions in the Cascade Range during the past 4, years Volcanoes have been erupting in the Cascade Range for over , years. Myers, Bobbie; Driedger, Carolyn L. Year Published: Geologic hazards at volcanoes Most volcano hazards are associated with eruptions.

Year Published: This dynamic planet: World map of volcanoes, earthquakes, impact craters and plate tectonics Our Earth is a dynamic planet, as clearly illustrated on the main map by its topography, over volcanoes, 44, earthquakes, and impact craters. Simkin, Tom; Tilling, Robert I. Year Published: Volcanoes! Geological Survey. Year Published: What are volcano hazards? Myers, Bobbie; Brantley, Steven R. Myers, B.

Geological Survey Fact Sheet —97, 2 p. Year Published: This dynamic earth: the story of plate tectonics In the early s, the emergence of the theory of plate tectonics started a revolution in the earth sciences. Kious, W. Jacquelyne; Tilling, Robert I. Filter Total Items: 5. Date published: May 6, Date published: May 17, This EarthWord is straight up steampunk Date published: May 16, Which sounds more dangerous, lava or mud?

The answer may surprise you Date published: August 22, When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the dissolved gases it contains are discharged. Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.

What follows is a brief description of these processes. As rock inside the earth melts, its mass remains the same while its volume increases--producing a melt that is less dense than the surrounding rock. This lighter magma then rises toward the surface by virtue of its buoyancy.

If the density of the magma between the zone of its generation and the surface is less than that of the surrounding and overlying rocks, the magma reaches the surface and erupts. Magmas of so-called andesitic and rhyolitic compositions also contain dissolved volatiles such as water, sulfur dioxide and carbon dioxide.

Experiments have shown that the amount of a dissolved gas in magma its solubility at atmospheric pressure is zero, but rises with increasing pressure. For example, in an andesitic magma saturated with water and six kilometers below the surface, about 5 percent of its weight is dissolved water. Do you know how to prepare for a volcanic eruption? Assess and plan Reduce risks Prepare to respond. Do's and don'ts. Learn and look out for volcano risks and warning signs.

Become familiar with volcano hazard map and danger zones. Be aware of secondary risks such as landslides and flash floods. Support vulnerable people to evacuate or shelter in place safely. Prepare and practice evacuating or sheltering in place. Watch: how to prepare for a volcanic eruption.