This is often used to study a 3 dimensional object that is very large, very small or not easily available.
What is a model?
100
This is marked with an X and gives the exact location and elevation.
What is a benchmark?
100
This type of boundary would be found at the location of sea floor spreading.
What is a divergent boundary?
100
This type of volcano, found in Hawaii, has a wide base and mild eruptions.
What is a shield volcano?
100
Wegner's first piece of evidence for continental drift included this visual description of the relationships between continental borders.
What is the continents fit together like a jigsaw puzzle?
200
This layer of earth consists of convection currents in molten magma.
What is the asthenosphere?
200
These are used to show a depression on a topographic map.
What are hachure marks?
200
This area is found when more dense plates are pushed beneath less dense plates.
What is a subduction zone?
200
This is the cause of volcanoes that are found in the middle of plates rather than at the edges of continental plates.
What is Hot Spot Volcanism?
200
This scientist is responsible for studying the concept of Seafloor Spreading.
Who was Harry Hess?
300
This layer of earth, 6371 kilometers below the surface, consists of iron and nickel.
What is the inner core?
300
This landform is shown on a map when adjacent contour lines overlap.
What is a cliff?
300
This type of boundary can have trenches, mountains, volcanoes and subduction zones form.
What is a convergent boundary?
300
This is the type of boundary where earthquakes usually occur.
What is a transform boundary?
300
This is a transform (strike-slip) boundary responsible for earthquakes and located in California.
What is the San Andreas Fault?
400
This layer of earth is part crust and part mantle.
What is the lithosphere?
400
On a topographic map, these lines are bolded and marked with a number.
What is an index contour?
400
These two factors cause plates to move.
What are convection currents and density?
400
The type of volcanic eruption depends on the amount of gases in the magma and this term given to the thickness of a liquid.
What is viscosity?
400
This is the reason that some convergent boundaries will form mountains instead of subduction zones.
What is equal density?
500
This type of rock makes up the majority of Earth's crust.
What is igneous rock?
500
A topographic map starts at 200 feet and ends at 900 feet. There are 6 lines between the elevations above, therefore the map has this contour interval labeled on its legend.
What is 100 feet?
500
This is the reason that one oceanic plate moves below another oceanic plate causing a subduction zone.
What is the plate that moves below is more dense?
500
This type of volcano has made the headlines during periods of violent eruptions, although it can also have quiet eruptions as well.
What is a composite volcano?
500
This is the location of 450 volcanoes and 75% of the world's earthquakes.