What is one reason we have stripes of alternating magnetism on the ocean floor?(1 point)
Responses
Magnetic direction of rock changes as Earth’s magnetic poles drift and reverse.
Plates move as new rock forms, which causes magnetic direction to skew away from normal.
Rock is constantly being destroyed at the mid-ocean ridge on the ocean floor
Minerals in magma match the magnetic direction present on Earth when it hardens into rock
Magnetic direction of rock changes as Earth’s magnetic poles drift and reverse.
What is one thing scientists can learn from studying the Paleomagnetism on the ocean floor?(1 point)
Responses
the cause of the magnetic pole reversals
the exact location of the next earthquake
the speed of the plates moving away from each other
when the next magnetic reversal will take place
the cause of the magnetic pole reversals
The Continental Crust, Oceanic Crust and very top of Earth's mantle make up a hard surface that breaks into tectonic plates. This layer of the Earth is referred to as the ____________(A)_ and it floats or moves on a melted layer of Earth called the ________________(B)__.
Crust, Mantle
Plates, Lithosphere
Lithosphere, Asthenosphere
Lithosphere, Hot Spot
Lithosphere, Asthenosphere
Where might we find the oldest rock on Earth?(1 point)
Responses
the center of continents
the center of the ocean floor
the highest mountain on Earth
pushed under a tectonic plate
pushed under a tectonic plate
WHERE are MOST Volcanoes located on the Earth?(1 point)
Responses
In the middle of plates
In the ocean
At the plate boundaries
On land
At the plate boundaries
Geologist discovered fossils of identical spider mites from the same time period but on opposite sides of the ocean from each other. What conclusion is supported by the discovery of these fossils?(1 point)
Responses
The climate was much cooler during the time that the mites lived.
The locations of the fossils were once much closer to each other.
The mites were extraordinary swimmers.
The locations of the fossils were once vast swamp lands.
The locations of the fossils were once much closer to each other.
What is so important about subduction of tectonic plates?(1 point)
Responses
Earth's crust is melted and destroyed here
Earth's new crust is created here
Earth's mountains are formed here
Earth's crust becomes a mid-ocean ridge here
Earth's crust is melted and destroyed here
Based on plate movement over a Hot Spot, which of of the Hawaiian Islands below would be the oldest?
Loihi
Hawaii
Maui
Oahu
Kauai
Kauai
Which of these are features of most stratovolcanoes?(1 point)
Responses
gentle slope near the top with thin, quickly flowing lava
wide near the base with sudden, violent eruptions
gentle slope near the base with somewhat quiet eruptions
steep sides near the top with thick, slow-moving lava
steep sides near the top with thick, slow-moving lava
Which of these is a feature of most shield volcanoes?(1 point)
Responses
broad base
violent eruptions
steep sides
thick lava
broad base
Correctly identify these terms for where an Earthquake occurs. [A,B,C]
A.Fault, B.Epicenter, C.Focus
A.Fault, B.Focus, C.Epicenter
A.Focus, B.Epicenter, C.Fault
A.Focus, B.Fault, C.Epicenter
A.Fault, B.Epicenter, C.Focus
Which waves arrive 2nd at the Epicenter, move the slowest and do the most damage?
ground is shaking this way P waves
waves are traveling this way S waves
S waves
Identify plate boundaries locations where earthquakes may occur....(1 point)
Responses
Convergent Plate Boundaries
Divergent Plate Boundaries
Transform Plate Boundaries
Earthquakes can occur at all boundary types
Earthquakes can occur at all boundary types
What is the importance of Seafloor Spreading to the Theory of Plate Tectonics?(1 point)
Responses
Where glacial deposits indicate it was once frozen
Where new crust is created as plates move and pull apart
Where coal deposits have been found connect to other plates
Where many fossils have been found on the sea floor