7.1 Volcanoes and plate tectonics
What is a Volcano?
is a weak spot in the crust where molten material or magma comes to the surface
Define an Element
An element is a substance that cannot be broken down into other substances, carbon hydrogen, and oxygen are examples of elements
Beneath a volcano magma collects in a pocket called a??
magma chamber
What is a shield volcano?
Thin layers of lava pour out of a vent and harden on top of previous layers. This lava flows gradually build a wide sloping mountain called a shield volcano.
What is brown, has a head, and tails, but no legs?
A penny
What is Magma?
is a molten mixture of rock, forming substances, gases, and water from the mantle
Define a compound
A compound is a substance made of two or more elements that have been chemically combined water carbon dioxide and tablesaw are familiar compounds
Molten rock and gas and then leave the volcano through an opening called the???
vent. This is the top of the volcano.
What is a cinder cone?
Ash cinders and bombs create a material that build up around the vent in a steep cone shaped hill or small mountain called a cinder cone
What can you catch, but not throw?
A cold
What is Lava?
When magma reaches the surface that is when it’s called lava
What is a Physical Property?
A physical property is any characteristic of a substance that can be observed or measured without changing the composition of the substance
A lava flow is an area covered by what?
lava as it pours out of a vent
What is a Composite Volcano?
Lava flows alternate with explosive eruptions of ash, cinder and bombs. The result is a composite volcano, which is a tall cone shaped mountain in layers of lava that alternate with different layers of ash.
What has a face, but can’t smile
A clock
What is the Ring of fire?
One major volcanic belt is the ring of fire formed by many volcanoes that rim the Pacific Ocean
Volcanoes occur in belts that extend across continents and oceans
What is a Chemical Property?
A chemical property is a property that produces a change in the composition of matter something that can burn combined or react with other substances
What are the two kinds of volcanic eruptions?
quiet or explosive
What is a volcanic neck?
A volcanic neck looks like a giant tooth stuck in the ground these form when magma hardens in a volcanoes pipe
What two things can you never eat for breakfast?
Lunch and dinner.
Name the 2 Volcanic boundaries
Diverging Boundaries
Converging Boundaries
Define Viscosity
Is the resistance of a liquid to flowing because liquids differ in viscosity some liquids flow more easily than others
Explain the difference between a dormant volcano and an extinct volcano
A dormant volcano is a sleeping volcano and can awaken in the future and become active
An extinct or dead volcano is unlikely to ever erupt again.
What is a sill?
When magma squeezes between horizontal layers of rock, it forms a sill
You buy me to eat, but you never eat me. What am I?
A fork