Science teset Flashcards
what type of rocks are volcanoes made of
igneous
The term volcano originally came from the name for what
Roman God
A_____________ is a depositional mountain built up by molsten rock that has risen to the earth’s surface through a vent
volcano
a volcano begins to form when magma forces its way to the surfac and breaks through forming a hole or what
vent
what is magma that reaches the earth’s surface
lava
The depression found at the top of most volcanic cones is called a __________
Crater
What is a crater like depression cuased by an explosion or the collapse of a volcanic cone
caldera
Where does pillow lava form
under water
Does a pyroclastic flow or glowing avalanche contain both gases and hto solid particles
yes
A mudslide caused a volcano is called a what
lahar
A ______________ is a vent in the ground through which hot gasses escape
fumaroles
Is the term tephra used to descube flowing lava that has cooled and soldfied on the ground
no
What are tiny angular galassy garments of solid lava called
ash
What is a steramlined mass o ejected lava blobs that soldified in flight called
bomb
Which of these lists is in the correct order from samllest to largest ash cinder bomb ash bomb cinder cinder ahs bomb cinder bomb ash
ash cinder bomb
Is the circum pacific volcano belt sometimes called the ring of fire
yes
Are many volcanoes found in areas of tectonic activity
yes
Which organimsa re the base or first step of the food chainaround black smokers deep within the ocean
bacteria
Flood _____ are thick layers of igneous rock covering larege portions of teh eath they are thought to have formed whn huge quantitiies of mama were realeased through cracks in the earth’s curst
basalts
What is a volcao that emits molsty lava in quiet eruptions
shield volcanoes