understanding checkpoint evidence of plate motion 1. __________ is the theory that explains how the continents got to where they are today 2. volcanoes and earthquakes and are common along plate boundaries. 75% of our volcanoes and 90% of earthquakes occur surrounding the pacific ocean a location called __________. 3. plates move away from each other at ______ boundaries. a. divergent b. convergent c. subduction d. geographical 4. plate movement is caused by a. earth’s rotation b. earth’s revolution c. convection currents d. the sun’s energy 5. these continents seem to fit together a. north america and south america b. north america and europe c. africa and south america d. africa and north america 6. how does fossil evidence help support the idea that the continents have moved? a. similar fossils that are found along the edges of different continents appear to fit together b. similar fossils of land dwelling dinosaurs found on different continents c. fossils are found in areas where the present - day climate would not allow the organisms to live today d. all of these 7. scientists have found that the continents were moving apart from each other due to magma rising out of mid - ocean ridges, and this is called a. sea - floor spreading b. sea - floor split c. underwater volcano d. trenches 8. t or f convergent movement often results in one plate pushing under another 9. t or f the further you get from the mid - ocean ridge, the younger the rock 10. t or f plates constantly move.

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Accepted Answer

### Question 1
# Brief Explanations:
The theory explaining continental movement is Continental Drift (or Plate Tectonics, but the primary theory for how continents got to their current positions is Continental Drift initially, now part of Plate Tectonics).
# Answer:
Continental Drift (or Plate Tectonics)

### Question 2
# Brief Explanations:
The area around the Pacific Ocean with most volcanoes and earthquakes is the Ring of Fire.
# Answer:
Ring of Fire

### Question 3
# Brief Explanations:
Plates move away at divergent boundaries. Convergent is towards each other, subduction is a type of convergent, geographical is not a plate boundary type.
# Answer:
a. divergent

### Question 4
# Brief Explanations:
Plate movement is caused by convection currents in the mantle. Earth's rotation/revolution and sun's energy don't cause plate movement.
# Answer:
c. convection currents

### Question 5
# Brief Explanations:
Africa and South America's coastlines fit (due to continental drift). North America - South America don't fit as well, North America - Europe don't, Africa - North America don't.
# Answer:
c. Africa and South America

### Question 6
# Brief Explanations:
All options support continental movement: similar fossils on fitting continents, land - dinosaur fossils on different continents (they couldn't cross oceans), fossils in non - suitable climates (continents moved). So all of these.
# Answer:
d. All of these

### Question 7
# Brief Explanations:
Magma rising at mid - ocean ridges causing continents to move apart is sea - floor spreading. Sea - floor split is not a term, underwater volcano is not the process, trenches are for subduction.
# Answer:
a. sea - floor spreading

### Question 8
# Brief Explanations:
Convergent movement often has one plate subducting (pushing under) another. So this is true.
# Answer:
T (True)

### Question 9
# Brief Explanations:
The further from mid - ocean ridge, the older the rock (new rock forms at the ridge). So this is false.
# Answer:
F (False)

### Question 10
# Brief Explanations:
Plates are constantly moving due to convection currents. So this is true.
# Answer:
T (True)

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