What is seafloor spreading?
When new oceanic crust is created at mid-ocean ridges
The sinking of oceanic plates at subduction zones
The formation of new volcanoes in the ocean
The movement of continents across the ocean floor
What is the main theory behind plate tectonics?
The Earth’s core is made of solid iron only.
The Earth’s crust is completely solid and does not change.
Earth's outer layer is divided into large, moving pieces.
Earth's continents are fixed in place.
Which of the following best describes the Earth's lithosphere?
The rigid outer layer, which is broken into tectonic plates
A region where oceanic plates meet continental plates
The inner core of the Earth
The layer of molten rock beneath the crust
Who developed the theory of continental drift?
Elvis Presley
Alfred Einstein
Marie Curie
Alfred Wegener
The Himalayas were formed by the collision of which two tectonic plates?
Indian and Eurasian
African and South American
North American and Eurasian
Pacific and North American
Where are most volcanic eruptions like to occur?
In places where there are no plate movements
In the middle of continents
At transform boundaries
At convergent and divergent plate boundaries
Continental plates are less dense than oceanic plates.
True
False
Which tectonic plate is B.C. on?
South American
North American
Indo-Australian
Antarctic
The process of one tectonic plate sliding underneath another is known as:
Subduction
Convection
Earthquake
Seafloor spreading
What happens at a transform boundary?
Plates move away from each other and form new crust.
Plates slide past each other horizontally; earthquakes
Plates move towards each other and form mountains.
Plates move downward into the mantle.
What kind of plate boundary is the Mariana Trench an example of?
Divergent
Transform
Convergent
Which major tectonic plate is composed of almost 100% oceanic crust?
Pacific
Eurasian
North American
African
What is formed when two tectonic plates collide at a convergent boundary?
Ocean ridges
Volcanoes
Earthquakes ONLY
Mountain ranges or deep ocean trenches
What kind of plate boundary is this?
Convection
Divergent
Transform
Convergent
Which of the following is NOT evidence supporting the theory of plate tectonics?
The shape of the continents, which appear to fit together
The matching of rock layers on different continents
The distribution of similar fossils across continents
The presence of deep ocean trenches only at mid-ocean ridges
What is the Ring of Fire?
A famous earhquake zone in the Atlantic Ocean
A belt of volcanic activity in the Arctic
A series of volcanoes in the Pacific Ocean
A region where many meteor impacts occur
Earthquakes are most commonly associated with which type of plate boundary?
Transform
All types of plate boundaries cause earthquakes
Convergent
Divergent
Which of the following is TRUE about the theory of continental drift?
Continental drift is unrelated to plate tectonics.
The continents have always been in their current positions.
There was once a supercontinent called Pangaea.
The movement of continents is caused by ocean currents.
What are the two kinds of tectonic plates?
Oceanic and Continental
What kind of plate boundary is this?
Transform
Convection
Convergent
Divergent
Which of the following is an example of a divergent boundary?
The Himalayan Mountains
The San Andreas Fault
The Mid-Atlantic Ridge
Mount St. Helens
What is the primary force driving the movement of tectonic plates?
Convection currents in the mantle
Earth's magnetic field
Wind currents
The Earth's rotation