1. a central crack forms where a thin section of earth’s crust breaks and molten rock seeps out. which geologic feature would result from this?
> volcano
> earthquake
> glacier
> shoreline

2. which geologic feature occurs at a convergent boundary?
> an ocean ridge
> an aperture
> a rill
> an earthquake

3. the theory of plate tectonics states that the earth’s surface is
> one solid piece
> broken into many pieces
> mostly covered in water
> very thick

4. plate tectonics explains which of the following?
> mudslides
> tornadoes
> ocean currents
> trenches

5. alfred wegener suggested that earth’s continents are moving. which evidence supports this theory?
> different types of of rocks on opposite coasts
> close geometric correspondence of continental coastlines
> revolution of the earth
> similarities in human fossils

6. what forms when the earth’s plates slide past each other?
> a volcano
> a glacier
> an ocean mountain
> an earthquake

7. how did wegener explain the fact that ancient horse fossils showed up on different continents?
> the horses swam between the two continents.
> the continents were at one time joined together.
> the fossils were moved by humans.
> the fossils must be of different species.
8. what is the most likely cause of plate movement?
> radiation from the sun
> heat convection within the earth
> movement of ice sheets
> cold air currents on earth’s surface
9. when mantle plumes (or hot spots) erupt underneath moving plates, which geologic feature results?
> earthquakes
> volcanic islands
> trenches
> divergent zones
10. there are some areas of the world where more than two plates react in complex ways. one example of this is near spain where three plates are moving together. what do we call these areas?
> plate boundary zones
> continental shelf zones
> trench zones
> the ring of fire

13. what causes an earthquake?
> hard collisions between tectonic plates
> extreme rock deformation
> buildup of magma
> buildup of pressure between tectonic plates