things to study Flashcards
friday
how are fold moutains formed
where two or more of Earth’s tectonic plates are pushed together
explain continental drift
the gradual movement of the continents across the earth’s surface
convection currents
heat-driven cycles that occur in the air, ocean, and mantle
divergent vs convergent
divergent :Plates move apart from each other.
Convergent Boundaries: Plates move toward each other
tranform
occurs when two tectonic plates slide past each other horizontally, causing earthquakes
which plate is denser
The oceanic plate is denser
Which plate is less dense
continental plate is less
What is subduction?
one tectonic plate is forced beneath another
Two continental plates colldiing form?
they form mountain ranges
Two Oceanic plates colliding form?
ocean trench and may create a volcanic island arc
What is a rift valley?
a deep valley formed when two tectonic plates pull apart
What forms when an Oceanic plate subducts beneath a Continental plate?
it forms a trenches and often leads to the formation of volcanoes on the continent.
What is the supercontinent called?
Pangaea. It existed about 300 million years ago
Who was Alfred Wegner?
a scientist who proposed that continents were once joined together and have drifted apart over time.
What is the Theory of Plate Tectonics?
the Earth’s outer layer is made up of large plates that move slowly on the softer layer beneath.
What is Oceanic Convergence?
occurs when an oceanic plate collides with another plate.
What is Continental Convergence?
when two continental plates collide, causing mountains to form, like the Himalayas.
What is a Dome Mountain?
A Dome Mountain is formed when magma pushes up the Earth’s crust, creating a rounded, dome-shaped mountain.
What is a Plateau Mountain?
a mountain with a flat top and steep sides, formed when land is lifted by tectonic forces.
Give an example of Fold Mountains?
The Himalayas are an example of Fold Mountains, formed by the collision of the Indian and Eurasian tectonic plates.
Where is the Pacific Ring of Fire?
The Ring of Fire is a zone around the Pacific Ocean, including the coasts of countries like Japan, Indonesia, the west coasts of the Americas, and New Zealand.
