What is the cause of most volcanoes found on land?

one plate sliding under another; subduction

Which type of lava has lowest viscosity and covers a wider area than lava with high viscosity?

low silica content lava (basalt)

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East High Volcanoes Quiz #1

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Aligns with 9th grade Earth Science textbook "EarthComm" Activities 1 and 2 of Volcanoes Chapter.

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Questions 11

Answers

1
Which type of volcano is tall with steep slopes and has magma of high-silica content?
Cinder cone
caldera
shield volcano
composite volcano
2
Volcanoes occur on Earth.......
at plate boundaries
where the climate is hot
only at the edges of oceans
evenly spaced on all continents
3
Which type of magma is likely to erupt most explosively?
medium silica content (60%)
low silica content (50%)
high silica content (70%+)
very low silica content (40%)
4
Which is the name for naturally occurring molten rock generated within the Earth?
Organic
Magma
Lava
Sedimentary
5
At which location(s) on the Earth would you LEAST expect volcanic activity?
Washington and Oregon
central United States
middle of the Atlantic Ocean
Iceland
6
Which is the name of the continuous mountain range found in Earth’s ocean basins?
Rift valley
Mid-ocean ridge
Ring of Fire
Irregular sea floor
7
What is the cause of most volcanoes found on land?
plates sliding past one another
one plate sliding under another; subduction
two plates moving together and both pushing upwards
two plates moving away from each other; rifting
8
Which location in the U.S. is the most likely site of a volcanic eruption?
A
D
C
B
9
On the map, which letter is the region on Earth called the “Ring of Fire?”
B
D
A
C
10
Which type of lava has lowest viscosity and covers a wider area than lava with high viscosity?
High silica content lava (rhyolite)
Medium silica content lava
silica content of lava doesn't impact its ability to flow
low silica content lava (basalt)
11
Which type of volcano is associated with low-silica magma and gentle, non-violent eruptions?
shield volcano
caldera
cinder cone
composite volcano

East High Volcanoes Quiz #1 Flashcards | StudBud