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WorksheetsMore about volcanoes
Total questions: 20
Worksheet time: 10mins
Explosive eruption that hurls ash, hot gases, cinders, and bombs from the main vent and travels at fast speeds down the volcano is called a . . .
Volcano bomb
Geyser
Geothermal energy
Pyroclastic flow
Fragments that are about as small as grains of sand.
Volcanic ash
Cinders
Bombs
Lava
Lava fragments that are like pebbles in size are called ______.
Volcanic ash
Cinders
Bomb
Lahar
What is the principal ingredient to all types of magma?
Iron
Magnesium
Silica
Water
Also known as Strato Volcanoes, this volcano is made from alternating layers of ash and lava is called a(n) _________________ volcano
composite
cinder cone
shield
fissure
Large, broad volcano that is formed from layers of lava.
cinder cone
shield
composite
fissure
Smaller volcanoes that typically throw ash and other rock fragments into the air during eruption
cinder cone
shield
composite
fissure
Where do hot spots occur?
In boundaries, where plates move away from each other.
In boundaries, where plates move toward each other.
Within plates, above a column of overheated part of the mantle.
Within plates, above a column of overheated part of the crust.
If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano? It is _________.
erupting
probably about to erupt
extinct
a good source of geothermal energy
Why are the eruptions of stratovolcanoes usually more destructive than the eruptions of shield volcanoes?
Stratovolcanoes erupt more frequently.
Magma in stratovolcanoes contains more gas.
Magma in stratovolcanoes is hotter.
Lava flows out of several openings in stratovolcanoes.
The lava from a stratovolcano is viscous. Which image shows the most viscous substance?
Which term best describes the landmass of Hawaii's big island?
Increasing
Diminishing
Disappearing
Constant
Which of the following is a major challenge to volcano preparedness?
Flowing lava is impossible to outrun.
Volcanoes are located far from inhabited areas.
Eruptions are unpredictable.
Disaster kits are not useful in the event of an eruption.
Which of the following countries lies along the Ring of Fire?
South Africa
Norway
Iran
Japan
Volcanic eruptions are caused by
gravity
pressure
explosions
Earth's rotation
________ volcanoes are no longer connected to a source of magma.
Active
Shield
Extinct
Dormant
Volcanoes form at
hot spots
divergent plate boundaries
convergent plate boundaries
all of these are correct
Signs that a volcano may soon erupt include
earthquakes
ground tilting
release of gases
all of these
