WorksheetsPlate Tectonics
Total questions: 41
Worksheet time: 30mins
What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
satellites
submarines
deep-sea diving
sonar
Old oceanic crust is more dense than new oceanic crust because it is
hot
cool
warm
closer to mid-ocean ridge
According to Wegener’s hypothesis of continental drift,
Earth’s surface is made up of seven major landmasses.
Earth is slowly cooling and shrinking
the continents do not move.
the continents were once joined together in a single landmass
A place where two plates slip past each other, moving in opposite directions, is known as a
rift valley
convergent boundary
transform boundary
divergent boundary
Most geologists think that the movement of Earth’s plates is caused by
convection currents in the mantle
earthquakes
tornadoes
landforms
Any trace of an ancient organism that has been preserved in rock is called a
fossil
pressured rocks
continent
landmass
What is Pangaea?
large grassy area
the name of an ancient fossil
the name of the supercontinent that existed millions of years ago
the name of a German scientist
A collision between two pieces of continental crust at a converging boundary produces a
mountain range
mid-ocean ridge
rift valley
deep-ocean trench
In sea-floor spreading, molten material rises from the mantle and erupts
along the edges of all the continents.
along mid-ocean ridges
in deep-ocean trenches
at the north and south poles
In sea-floor spreading, molten material rises from the mantle and erupts
along the edges of all the continents.
along mid-ocean ridges
in deep-ocean trenches
at the north and south poles
The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of
plate tectonics
subduction
deep-ocean trenches
sea-floor spreading
Subduction occurs where the oceanic crust bends down toward the mantle at a(n)
continental drift
deep-ocean trench
The hypothesis of (a) was that all the continents once were joined as a single supercontinent and have since drifted apart.
When continental plates pull apart at a divergent boundary on land, a(n) (a) forms.
The process of (a) continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.
The lithosphere is broken into sections called ____________________, which float on top of the asthenosphere.
deep trench
sea-floor spreading
Along a divergent boundary, two plates slip past each other, moving in opposite directions.
True
False
Alfred Wegener provided evidence from landforms, fossils, and climate in support of his theory of the shrinking Earth.
True
False
If subduction occurs faster than oceanic crust can be created, an ocean will expand.
True
False
Oceanic crust near the mid-ocean ridge is younger than oceanic crust farther away from the ridge
True
False
Mid-ocean ridges form the longest mountain ranges on Earth.
True
False
Divergent boundary
occurs when two tectonic plates move away from each other
occurs when two tectonic plates move toward each other
Transform boundaries
places where plates slide sideways past each other
places where plates slide away from each other
The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
deep trench ocean
Sea-floor spreading
What occurs when an oceanic plate runs into a continental plate and slides beneath it.
earthquakes
subduction
What is molten rock that is underground?
lava
magma
What is formed from magma that cools and solidifies within the crust of the planet.
Lava rocks
Intrusive rocks
What is produced when magma exits and cools above (or very near) the Earth's surface
Extrusive rocks
Igneous Rocks
What is an opening in the earth's crust through which lava, volcanic ash, and gases escape?
Earthquake
Volcano
What is a naturally occurring inorganic element or compound having an. orderly internal structure and characteristic chemical composition, crystal form, and physical. properties?
mineral
coal
What tendency of a crystalline substance to split into fragments bounded by plane surfaces
Mineral
Cleavage
Geologist
an expert in or student of life
an expert in or student of geology
What is solid material that is moved and deposited in a new location?
Crystal
Sediment
A large continuous mass of land conventionally regarded as a collective region
Continent
Grass field
Plate tectonics a theory explaining the structure of the earth's crust and many associated phenomena as regarded as a collective region
True
False
A long horseshoe-shaped seismically active belt of earthquake epicenters, volcanoes, and tectonic plate boundaries that fringes the Pacific basin.
Island Arc
Ring of Fire
A curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side
Island Arc
Bermuda Triangle
Convergent Boundary
A tectonic boundary where four plates are moving toward each other and crashing
A tectonic boundary where two plates are moving toward each other
Supercontinent
A hypothetical former large continent from which other continents are held to have broken off and drifted away.
A tectonic boundary where two plates are moving toward each other. If the two plates are of equal density, they usually push up against each other.
Any mineral that forms igneous, sedimentary, or metamorphic rocks and that typically, or solely, forms as an intimate part of rock-making processes.
Rock Forming Mineral
Intrusive Rocks
Name the 7 continents.
