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

magma rises into the spaces where tectonic plates pull away from one another.

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.

Seafloor spread occurs because....

Magma below the Earth's crust is forced up toward the surface after plates move apart

Plates are smashing together and oozing apart

Maui is trying to break out of his prison

The Earth's magnetic poles are reversing

Sea-floor spreading explains how.....

new crust is created at a divergent boundary

volcanoes are formed on continents

In the Atlantic ocean, where is the youngest seafloor located?

Youngest seafloor is in the middle of the ocean

One of the very large sections of hard rock that make up Earth's outer layer.

A new song release from "P-late."

An object that is used for serving food on.

Round, smooth portions of the Mantle.

Alfred Wegner proposed the Theory of Continental Drift in 1912. He stated that millions of years ago, all the continents were one large landmass called Pangaea. Over millions of years, the continents have been moving away from each other. Alfred Wegner did not know what caused the plates to move, but today we do. What happens to the continents that were once part of the supercontinent, Pangea? Use “Theory of Continental Drift”.

They slowly drifted apart and formed the continents we see today

They remained in the same position over time

They are all still part of current day Pangea

They were all destroyed by an asteroid that struck Earth

A plate boundary where two tectonic plates slide horizontally past one another

process in which two lithospheric plates of different densities converge and the denser one sinks into the mantle beneath the other

A plate boundary where two tectonic plates move apart from each other

A plate boundary where two tectonic plates move toward each other and collide

Theory of Continental Drift Alfred Wegner proposed the Theory of Continental Drift in 1912. He stated that millions of years ago, all the continents were one large landmass called Pangaea. Over millions of years, the continents have been moving away from each other. Alfred Wegner did not know what caused the plates to move, but today we do. When Alfred Wegner first proposed the theory of continental drift, what key detail was missing? Use “Theory of Continental Drift”.

An explanation of what was causing the tectonics plates to move

Evidence that the continents were all once connected

Fossil records that supported the movements of fossils

Observations of similar rock formations on different continents

Theory of Continental Drift Alfred Wegner proposed the Theory of Continental Drift in 1912. He stated that millions of years ago, all the continents were one large landmass called Pangaea. Over millions of years, the continents have been moving away from each other. Alfred Wegner did not know what caused the plates to move, but today we do. Which two pieces of evidence best support the Theory of Continental Drift? Use “Theory of Continental Drift”

The shapes of continents appear to fit together like puzzle pieces

The continents have all moved closer together over time

Similar fossils of the same species are found on continents separated by oceans

Fossils on continents are identical to the fossils on the seafloor

Fossils are evenly found across all continents

Mid Atlantic Ridge Data The mid-Atlantic ridge data is based on sediment samples taken from different locations on both sides of the ridge. The data from the mid-Atlantic ridge and a map of where the data was obtained are shown in the picture. What evidence supports the idea of seafloor spreading? Use “Mid Atlantic Ridge Data.”

Rocks near the mid-ocean ridge are younger than rocks farther away.

Rocks near the mid-ocean ridge are older than the rocks farther away.

The sediment on the West are older than sediment on the East.

The distance from the ridge does not affect the age of the sediment.

Mid Atlantic Ridge Data The mid-Atlantic ridge data is based on sediment samples taken from different locations on both sides of the ridge. The data from the mid-Atlantic ridge and a map of where the data was obtained are shown in the picture. If a new sample were taken 1,500 km west of the ridge, what would you predict about the age of the sediment at this location?

It would be older than 67 million years.

It would be younger than 67 million years.

It would be the same age as Site A (67 million years).

It would be the same age as samples on the east side of the ridge.

Unit 6 Seafloor Spreading Review Quiz

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Science

Earth & Space Science

Seafloor Spreading

Unit 6 Seafloor Spreading Review

Authored by Mrs. Johnson

Science

6th Grade

NGSS covered

Used 9+ times

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25 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Trenches

Divergent Boundaries

Lithosphere

Subduction

Tectonic Plates

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Trenches

Divergent Boundaries

Lithosphere

Subduction

Tectonic Plates

Tags

NGSS.MS-ESS3-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Trenches

Divergent boundaries

Lithosphere

Subduction

Tectonic Plates

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

5. The rigid, outmost layer of Earth

Trenches

Divergent Boundaries

Lithosphere

Subduction

Tectonic Plates

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

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Unit 6 Seafloor Spreading Review

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

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

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

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

5. The rigid, outmost layer of Earth

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

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 –

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

9. Old seafloor is destroyed at ____________.

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

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Unit 6 Seafloor Spreading Review

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

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

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

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

5. The rigid, outmost layer of Earth

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

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 –

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

9. Old seafloor is destroyed at ____________.

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

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

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