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Earthquakes & volcanoes
vocab
33
Science
4th Grade
04/03/2014

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Cards

Term
vocab
Definition
definition
Term
Earthquake
Definition
vibration, or shaking, of Earth's crust
Term
Fault
Definition
a break in the crust along which rock moves
Term
Focus
Definition
the point underground where the movement first took place is called the
Term
Epicenter
Definition
is the point on the surface that is right above the focus
Term
Seismograph
Definition
an instrument that records earthquake waves
Term
Mercalli Scale
Definition
scale measures the movement and damage that an earthquake causes using Roman numerals from I to XII
Term
Richter Scale
Definition
This scale uses the numbers 1 through 9 to measure the energy an earthquake
Term
vocab
Definition
definition
Term
Earthquake
Definition
vibration, or shaking, of Earth's crust
Term
Fault
Definition
a break in the crust along which rock moves
Term
Focus
Definition
the point underground where the movement first took place is called the
Term
Epicenter
Definition
is the point on the surface that is right above the focus
Term
Seismograph
Definition
an instrument that records earthquake waves
Term
Mercalli Scale
Definition
scale measures the movement and damage that an earthquake causes using Roman numerals from I to XII
Term
Richter Scale
Definition
This scale uses the numbers 1 through 9 to measure the energy an earthquake
Term
Volcano
Definition
a mountain that forms when red-hot melted rock flows through a crack onto the earth's surface
Term
Magma
Definition
Melted rock inside the Earth
Term
Lava
Definition
Melted rock that reaches the Earth's surface
Term
Vent
Definition
an opening where Magma flows onto the surface to form volcanic mountains
Term
Magma chamber
Definition
an underground pool that holds hot magma
Term
Epicenter
Definition
Damage is usually worst near the
Term
crust, mantle, core
Definition
three main layers
Term
Mercalli Scale & Richter Scale
Definition
Two scales that scientists use to measure earthquakes
Term
Crust
Definition
the outter layer of the Earth
Term
mantle
Definition
the layer below the earth's crust or the middle layer
Term
mantle
Definition
this is the thickest layer of the planet and is mostly rock
Term
core
Definition
a dense ball made mostly of two metals, rion and nickel
Term
inner core
Definition
a solid ball made mostely of iron and nickel and is the hottest layer of the earth
Term
outter core
Definition
a pool of hot liquid metal
Term
plates
Definition
Earth's crust and upper mantle are broken into continent-sized slabs called
Term
San Andreas fault
Definition
this runs through many miles of desert and mountains in southern California
Term
Describe how plates move & where this occurs
Definition
Plates move toward each other (mountains & volcanoes); plates rub or move past each other (earthquakes) & plates move apart, slowly (ocean floor)
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