Science Flashcards
are vents in Earth’s crust (the outermost layer of the Earth), from which volcanic materials such as molten rocks and gases are ejected.
Volcanoes
,
a region of high seismic and volcanic activities in the basin of the Pacific Ocean.
Pacific Ring of Fire
The areas where plates collide are marked by long, deep depressions called.
trenches
According to the plate tectonic theory, the Earth’s mechanical outer layer called the
lithosphere
divided into several segments called
Tectonic plates
,
which consists of the upper mantle.
Asthenosphere
is a method of heat transfer by which cold, dense material sinks, whereas hot, less dense rises.
Convection
When two plates of different density collide, the denser (oceanic plate) moves beneath the less dense (continental plate). This process is called,
subduction
forming volcanoes called ___ _____ ______ in the ocean floor.
mid ocean ridges
is an area in the mantle where rocks melt because of the intense heat emanating deep within the mantle.
Hot spot
which are the sides of a volcano, extend to the summit.
Flanks
is the apex or the highest point of a volcano
Summit
the mouth of a volcano
Crater
are those that have erupted within the last 600 years
Active Volcanoes
is the second most active volcano in the country.
Taal
is the most active volcano in the Philippines
Mayon Volcano
is the third most active volcano in the Philippines
Kanlaon Volcano
has been constantly erupting for over 35000 years
Mt. Etna
or the “Peak of the Furnace” is considered as one of the three most active volcanoes worldwide.
Piton de la Fournaise
Volcano’s most recent eruption in 1902 is considered as one of the largest eruptions in the 20th century
Santa Maria
The most active volcano in Africa is,
Mt. Nyiragongo
which is also known as “The Lighthouse of the Mediterranean”
The island of Stromboli