Sea-Floor Spreading: Examining the process

1. 1Name an describe the feature of the ocean floor shown at A

   

   1. AMolten material pushes up to the surface from the mantle and a mid ocean ridge is formed
   2. BSea-floor spreading and the sea floor gets larger
   3. CNew molten material pushes the old oceanic crust away from the mid ocean ridge
   4. DPillow lava, magnetic stripes, drilled rock samples
   5. ESubduction that forms a Trench because two lands hit each other and one goes under the other
2. 2Name the process occurring at B, and explain what results from it

   

   1. AMolten materials pushes up to the surface from the mantle and a mid ocean ridge is formed
   2. BSea-floor spreading and the sea floor gets larger
   3. CNew molten material pushes the old oceanic crust away from the mid ocean ridge
   4. DPillow lava, magnetic stripes, and drilled rock samples
   5. ESubduction that forms a trench because two lands hit each other and one goes under the other
3. 3What happens to the old oceanic crust as new molten material rises from the mantle?

   

   1. AMolten material pushes up to the surface from the mantle and a mid ocean ridge is formed
   2. BSea-floor spreading and the sea floor gets larger
   3. CNew molten material pushes the old oceanic crust away from the mid ocean ridge
   4. DPillow lava, magnetic stripes, and drilled rock samples
   5. ESubduction that forms a trench because two lands hit each other and one goes under the other
4. 4The arrows on the diagram show the ocean floor spreading from the ridge. What are the 3 kids of evidence scientists have found to support this idea?

   

   1. AMolten material pushes up to the surface from the mantle and a mid ocean ridge is formed
   2. BSea-floor spreading and the sea floor gets larger
   3. CNew molten material pushes the old oceanic crust away from the mid ocean ridge
   4. DPillow lava, magnetic stripes, and drilled rock samples
   5. ESubduction that forms a trench because two lands hit each other and one goes under the other
5. 5What process is shown occurring at C, and why does it occur?

   

   1. AMolten material pushes up to the surface from the mantle and a mid ocean ridge is formed
   2. BSea-floor spreading and the sea floor gets larger
   3. CNew molten material pushes the old oceanic crust away from the mid ocean ridge
   4. DPillow lava, magnetic stripes, and drilled rock samples
   5. ESubduction that forms a trench because two lands hit each other and one goes under the other
6. 6Choose three types of evidence, below, for sea-floor spreading

   1. APillow lava
   2. BMagnetic stripes
   3. CDrilled rock samples
   4. DPresence of sedimentary rock
   5. EVolcanoes
   6. FUsing sonar
7. 7When using drilled rock samples to test for sea-floor spreading, OLDER rocks are [blank_start]further away from[blank_end] the ridge

   1. Afurther away from
   2. Bcloser to
8. 8When using drilled rock samples to test for sea-floor spreading, NEWER rocks are [blank_start]closer to[blank_end] the ridge.

   1. Acloser to
   2. Bfurther away from
9. 9The pattern of stripes is different on both sides of mid ocean ridges

   1. ATrue
   2. BFalse
10. 10At deep ocean trenches, conduction allows oceanic crust to sink back into the mantle

    1. ATrue
    2. BFalse

11. 11The Pacific Ocean is shrinking

    1. ATrue
    2. BFalse
12. 12The Atlantic Ocean is shrinking

    1. ATrue
    2. BFalse
13. 13What process in Earth’s interior (the mantle) causes sea-floor spreading and subduction?

    1. AConvection currents
    2. BMagnetic fields
    3. CContinental divide
    4. DCreation of metamorphic rock
14. 14Select the sentences that are true about Earth’s magnetism

    1. AAt times in the past, a compass needle on Earth would have pointed south.
    2. BRock that makes up the ocean floor lies in a pattern of magnetized stripes.
    3. CThe pattern of stripes is different on both sides of mid ocean ridges.
    4. DThe magnetic memory of rock on the ocean floor changes over time.

Description

6th grade Science (Sea-Floor Spreading) Quiz on Sea-Floor Spreading: Examining the process, created by Jill Hurley on 02/06/2019.

Author

Jill Hurley

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English

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sciencesea-floor spreading6th grade

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