Question
The image below is a cross section through the Earth's interior. Tectonic plates of the lithosphere are shown in grey at the Earth's
surface. The Earth's mantle is shown in red-orange. Black arrows in the lithosphere show the directions in which tectonic plates
move. Red arrows in the mantle represent convection currents.
Ridge
Lithosphere
Trench "SLAB PULL'
Trench
Mantle
Asthenosphere
700 km
Outer core
Inner
core
Image courtesy of USGS
The part of the diagram labeled as "Ridge" represents, a mid-ocean ridge, where two tectonic plates move away from each other.
The part of the diagram labeled as "Trench" marks an ocean trench, a location beneath which one plate plunges under another.
According to this diagram, convection currents begin to move
beneath trenches.
_beneath mid-ocean ridges and begin to move
O A. upward; upward
• B. downward; downward
c. downward; upward
• D. upward; downward
Session Score: 67% (4/6)
Answer
D. upward; downward