WorksheetsReview - Seafloor Spreading
Total questions: 10
Worksheet time: 3mins
Seafloor spreading occurs because ____.
new material is being added to the asthenosphere
earthquakes break apart the ocean floor
sediments accumulate at the area of spreading
molten material beneath Earth's crust rises to the surface
What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
satellites
submarines
deep-sea diving
sonar (echo sounder)
The scientist credited with the discovery of sea-floor spreading is _________
Alfred Wegener, a German scientist
Harry Hess, an American geologist
J.Tuzo Wilson, a Canadian scientist
Kenn Bulaso, a Filipino educator
In sea-floor spreading, molten material rises from the mantle and erupts
in deep-ocean trenches
along the edges of all the continents
along mid-ocean ridges
at the north and south plate
The youngest rocks on the ocean floor are located ____.
near continents
at mid-ocean ridges
far from mid-ocean ridges
near Asia
The process of ___________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.
plate tectonics
seafloor spreading
continental drift
convection
What kind of plate boundary is shown on the picture?
divergent
convergent
transform
trench
