This is
These are the two signs that a volcano might erupt soon
What is 1) Rising temperature in volcanic lake
2) Studying how long it has been since the last eruption
3) Studying the tilt of the land can indicate if magma is moving under the ground?
This is what a fumarold releases?
What is steam and other gases?
This is where you would find blocks of rock that have tilted along faults
What is along ocean spreading centers?
This is one reason that volcanoes can be dangerous even if they are far away from humans
What is volcanic ash clouds?
These are the effects of volcanic eruptions on Earth's atmosphere
What are an increase in acid rain and a decrease in Earth's atmosphere?
Before magma erupts, it collects under the volcano in a
What is a chamber?
This is what folded mountains and fault-block mountains have in common
What is they both took millions of years to form?
This is a deep-sea vent
What is a hot spring that has formed at an ocean spreading center?
How are locations of volcanoes related to tectonic plate boundaries
What is volcanoes commonly occur at divergent boundaries and subduction boundaries?
The type of magma erupting from a volcano determines the volcanoes
What is shape?
This is how an old mountain belt located in the center of a continent most likely formed
What is as different parts of the continent pushed together along a collision boundary?
This is why pyroclastic flow is so dangerous
What is its heat, steam, and speed?
In a volcanic region, water moving through the ground gets _______________ by magma or hot rock
What is heated?
These are the three places where volcanoes can form
What is converging boundaries, diverging boundaries, and hot spots?
This is how a deep sea vent is formed
What is at ocean spreading centers, cracks in the ocean floor form as two oceanic plates pull apart. Cold ocean water moves down through the cracks and is heated by hot rock that has cooled from magma. This hot water then rises again. The rising hot water exits Earth's crust through deep-see vents. The vent water usually contains large amounts of dissolved minerals and gases The minerals can become solid again and build up around the vents?
This is how a composite volcano grow
What is through the build up of hardened lava?
When two plates carrying continental crust collide, the rock of the continents
What is folds?
This is a dense cloud of superhot gases and rock fragments that race downhill
What is pyroclastic flow?
This is how composite volcanoes erupt
What is violently because of the trapped gases in the rising magma and because their openings may have been plugged by hardening lava from earlier eruptions?
The explosiveness of a volcanic eruption depends mostly on the _________ of the magma
What is silica content?
This is how folded mountains form
What is when two continental plates collide. The tectonic plates are moving towards each other. They form along convergent boundaries where two tectonic plates are colliding. The pressure of the slow collisions cause the crust to bend into folds. Over time, the folds are pushed up and become mountains?
This is how a shield volcano is formed
What is when silica-poor lava flows onto Earth's surface. Because it flows so easily, it spreads out to form many thin layers. These thin layers create gently sloping sides?
This is how a cinder cone volcano is formed
What is by the eruption of cinders and other rock fragments that pile up around a single crater. They form as gas-rich magma erupts. They throw small chunks of lava in the air where they harden before landing? They can be tens to hundreds of meters tall?
This is how fault block mountains form
What is they form as the lithosphere is stretched and pulled apart by forces within the Earth. They form as blocks of rock move up or down along normal faults. They form where the lithosphere is pulling apart, such as along divergent boundaries. The stretching causes the crust to break into large blocks. Over time, the blocks drop and tilt, becoming mountains and valleys?
This is how a cinder cone volcano can be found
What is usually on the sides of other volcanoes?