What is a weak spot in the crust where molten rock, or MAGMA, comes to the surface.
100
What is the definition of an earthquake
It is what happens when two blocks of the earth suddenly slip past one another.
100
What are the two ways we classify earths layers
What are physical and chemical layers
100
What is the theory that earths plates move?
What is continental drift
100
What are the two types of lava from a quiet eruption called?
What is Aa and Pahoehoe
200
What is the difference between magma and lava?
Magma is inside the earth and contains gas, lava is outside of the earth and has no gas.
200
What are the three types of faults
What is normal, strike slip and thrust
200
Chemical layers are grouped based on
What they are made up of what the ingredients are like aluminum, magnesium
200
What scientist came up with the theory of continental drift?
Who is alfred weneger
200
What is the stuff that comes out of a explosive volcano called?
What is pyroclastic flow
300
What are the two factors that affect how thick magma is?
What is the amount of silica and the temperature
300
What is it called when earth and rock goes back to its original shape
What is Elastic Rebound
300
What are the physical layers grouped by?
What is how they appear are they hard, soft, liquid, rigid, bendable
300
How does convection move earths plates?
The core heats up the mantle, it becomes less dense and rises then cools down and creates a current.
300
What is the machine called that measures earthquake vibrations?
What is a seismograph
400
What are the three types of volcanoes
What is shield, cinder cone and composite.
400
What are the three types of seismic waves?
What is P (primary), s (secondary) and surface
400
What are the three chemical layers in order
What is crust, mantle and core
400
What was it called when all continents were together
What is pangea
400
What kind of volcano has thick magma, explosive eruptions of pyroclastic flow?
What is cinder cone
500
What is the differences between quiet and explosive eruptions?
A volcano erupts quietly if the gas bubbles out easily and if the lava is thin and flows easily.
A volcano erupts explosively if the magma is thick and sticky and plugs the volcano and gas builds up Pressure
500
What are the two scales for measuring earthquakes called and what do they measure?
What is the Richter scale which measures intensity and magnitude and the Mercalli scale which measures the effect on buildings and people.
500
What are the five physical layers in order
What is lithosphere, asthenosphere, mesosphere, outer core and inner core
500
What is the definition of convection?
Convection is the transfer of heat through the movement of particles from one place to another in a fluid (gas or liquid).
500
What is the area on the planet where most volcanoes and earthquakes occur