Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
Where are the youngest rocks located on the ocean floor?
|
The youngest rocks are located at the mid-ocean ridge.
|
|
|
What is the lithosphere?
|
The lithosphere is made up of the crust and the upper mantle.
|
|
|
Where do plates of the lithophere float?
|
Plates of the lithophere float on top of the asthenopshere.
|
|
|
Plate movement can be seen at _____________.
|
plate boundaries
|
|
|
What are some clues that support the hypothesis of continental drift?
|
rock, fossil,climate clues and continental coastlines,
|
|
|
What is continental drift?
|
The hypothesis that the continents have slowly moved to their current location.
|
|
|
What do the plates do at a divergent plate boundary?
|
Plates move apart.
|
|
|
What do the plates do at a covergent plate boundary?
|
Plates collide.
|
|
|
What do the plates do at a transform plate boundary?
|
Plates slide past one another.
|
|
|
Name some evidence that reflects the fact that Earth's magnetic field has reversed several times.
|
The alignment of iron minerals that form stripes or alternating bands.
|
|
|
What was the supercontinent called?
|
Pangaea
|
|
|
Molten material beneath Earth's crust rises to the surface and causes _________.
|
seafloor spreading
|
|
|
Name the fossil plant that was a clue that supported continental drift.
|
Glossopteris
|
|
|
What is a magnetometer?
|
A device used to detect magnetic fields on the seafloor and record the magnetic signature of the rocks on the seafloor.
|
|
|
What drives plate movement?
|
convection currents
|
|
|
The East African Rift is an example of a _____.
|
continental rift
|
|
|
Volcanoes occur at a _____ boundary.
|
convergent oceanic-continental boundaries
|
|
|
How are mountains formed?
|
When two continental plates collide.
|
|
|
Name an example of a transform plate boundary.
|
San Andreas Fault
|
|
|
When two oceanic plates collide _________ can form.
|
line of volcanoes
|
|
|
Where is the youngest part of the ocean floor found?
|
Closest to the mid-ocean ridge.
|
|
|
Convection currents occur in Earth's __________.
|
mantle
|
|
|
What is a mid-ocean ridge?
|
underwater mountain chain
|
|
|
Name a process that occurs at a transfrom plate boundary and that happens rapidly.
|
an earthquake
|
|
|
What is subduction?
|
When one tectonic plate descends beneath another.
|
|
|
What is seafloor spreading?
|
New crust is created at mid-ocean ridge and pushes away the old crust.
|
|
|
What is a magnetic reversal?
|
A change in Earth's magnetic field.
|
