Unit 6 Seafloor Spreading Review

1. The process in which a denser plate is pushed beneath a less dense plate.

• Trenches
• Divergent Boundary
• Lithosphere
• Subduction
• Tectonic plates

Tags

NGSS.MS-ESS2-3

2. Massive pieces of land that are part of Earth's crust and upper mantle.

• Trenches
• Divergent Boundaries
• Lithosphere
• Subduction
• Tectonic Plates

3. The deepest parts of the ocean; long, narrow ditches.

• Trenches
• Divergent Boundaries
• Lithosphere
• Subduction
• Tectonic Plates

Tags

NGSS.MS-ESS3-2

4. A boundary formed when two plates move away from each other.

• Trenches
• Divergent boundaries
• Lithosphere
• Subduction
• Tectonic Plates

5. The rigid, outmost layer of Earth

• Trenches
• Divergent Boundaries
• Lithosphere
• Subduction
• Tectonic Plates

6. Scientists study the distribution of ___________, rocks, and continental shapes in order to understand the movement of ___________________

• ridges, mid-ocean ridge
• fossils, tectonic plates
• ocean basins, earthquakes
• ridges, mid-ocean ridge.

Tags

NGSS.MS-ESS2-3

7. Examining rocks that form on either side of the Mid-Atlantic Ridge provides evidence that supports the theory of Plate Tectonics. These rocks provide evidence of plate movement because, as we look at rocks farther and farther from the ridge, the rocks –

• have higher iron content
• are made up of smaller particles.
• become thicker and thicker.
• are consistently older.

Tags

NGSS.MS-ESS2-3

8. When two tectonic plates pull apart, a _____________ is formed on the ocean floor.

• earthquake
• ridge
• mid-ocean ridge
• trench

9. Old seafloor is destroyed at ____________.

• Trenches
• Ridges
• mid-ocean ridge
• ocean basin

Tags

NGSS.MS-ESS2-3

10. New seafloor material is formed at places in Earth’s crust where –

• rock is broken into pieces as tectonic plates push against one another.
• one tectonic plate slides beneath another and is forced downward.
• lava flow from volcanic eruptions builds up over many thousands of years.
• magma rises into the spaces where tectonic plates pull away from one another.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3