How Did The Red Sea, Shown Between Arabia And Africa In This Figure, Form??
How did the Red Sea, shown between Arabia and Africa in this figure, form? Continental Rifting followed by seafloor spreading.
What causes magnetic stripes on the seafloor such as those shown here?
When lava gets erupted at the mid-ocean ridge axis it cools and turns into hard rock. … This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges. These patterns of stripes provide the history of seafloor spreading.
Which of the following statements are accurate about what happens when two oceanic plates converge?
Which of the following statements are accurate about what happens when two oceanic plates converge? Buoyant magma rises into the overlying plate. Temperatures increase within the subduction zone, releasing water, which induces melting. An oceanic trench is formed and sediments begin to collect.
What do the trenches offshore from Japan indicate?
Terms in this set (26) Which of the following features is present on the seafloor off the Pacific Northwest? In this figure of Japan, what do the offshore trenches indicate? … sea floor spreading.
Which of the following parts of the seafloor are the shallowest?
Midocean ridges reach a typical summit elevation of 2,700 meters below sealevel. They are the shallowest major features of the seafloor. Perhaps counter to expectation, the oceans are deeper closer to continents and farthest from midocean ridges.
How did the Red sea shown between Arabia and Africa in this figure form quizlet?
How did the Red Sea, shown between Arabia and Africa in this figure, form? Continental Rifting followed by seafloor spreading.
What creates magnetic stripes on the seafloor quizlet?
Evidence from magnetic stripes is found on the seafloor. The magnetic stripes are created by the reversal of Earth’s magnetic field. … Subduction happens near trenches so the sea-floor can be melted and solidified again.
What happens during sea floor spreading?
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.What evidence best supports the plate tectonic theory?
There is variety of evidence that supports the claims that plate tectonics accounts for (1) the distribution of fossils on different continents, (2) the occurrence of earthquakes, and (3) continental and ocean floor features including mountains, volcanoes, faults, and trenches.What is the type of plate boundary that occurs between the African plate and the Arabian plate?
Explanation: A divergent boundary with the African Plate called the Red Sea Rift while in Arabian Plate is a left-lateral transform fault boundary called the Dead Sea Rift.
What was the main mystery described for the Mediterranean Sea?
What was the main mystery described for the Mediterranean Sea? The Mediterranean dried up and deposited layers of salt.
What is an accretionary wedge and how does it form quizlet?
What is an accretionary wedge, and how does it form? An accretionary wedge is an accumulation of deformed, thrust-faulted sediments and scraps of ocean crust. This wedge is plastered against the edge of the overriding plate from the subducting plate.
Which of the following shows the correct order for a scientific explanation?
Make a hypothesis, test the hypothesis, analyze the results, ask a question, draw conclusions, communicate results.
What’s beneath the ocean floor?
Features of the ocean include the continental shelf, slope, and rise. The ocean floor is called the abyssal plain. Below the ocean floor, there are a few small deeper areas called ocean trenches. Features rising up from the ocean floor include seamounts, volcanic islands and the mid-oceanic ridges and rises.
What is the bottom of the sea called?
The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as ‘seabeds’.How do scientists measure ocean depths?
The most common and fastest way of measuring ocean depth uses sound. Ships using technology called sonar, which stands for sound navigation and ranging, can map the topography of the ocean floor. The device sends sound waves to the bottom of the ocean and measures how long it takes for an echo to return.What do the island chains of Hawaii Tahiti and Tristan da Cunha have in common quizlet?
what do the island chains of Hawaii, Tahiti, and Tristan da Cunha have in common? The formed from hot spots. … The seafloor east of Papua New Guinea has small basins, trenches, and island arcs.
What method produces images of the materials beneath the seafloor using sound waves?
Seismic reflection uses a stronger sound signal and lower sound frequencies (10-50 Hz) than echosounding in order to look deeper below the seafloor.
Which letter is over the youngest oceanic crust?
30 Cards in this Set
| How did the Red Sea, shown between Arabia and Africa in this figure form? | Continental rifting followed by seafloor spreading |
|---|---|
| Where is subduction occurring on this map of South America? | B |
| On the accompanying figure, which letter is over the youngest oceanic crust? | D |
How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading they show when Earth’s poles reversed?
How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading? … They show how the density of the seafloor has changed. They reveal a matching pattern on either side of the ridge. They reveal differences in the mineral composition of newly created rock.
How did the chain of volcanic islands and seamounts shown here form?
As a crustal tectonic plates move over hot spots mantle material upwells and erupts on the surface of the plate to form a volcano, seamount or volcanic island. The islands and seamounts of the Hawaiian Archipelago were created by a hot spot under the Pacific Plate that has been active for the past 41 million years.
Which statement accurately describes how magnetic stripes in ocean rock?
Which statement accurately describes how magnetic stripes in ocean rock provide evidence of seafloor spreading? C. The pattern of magnetic strips shows that the seafloor is expanding at mid-ocean ridges.
What do the paper strips represent?
The strips of paper represent oceanic crust or seafloor. 3. The oldest sections should be the sections on both sides furthest from the middle 4. Seafloor spreading is the creation of new seafloor or new oceanic crust 5.
What are formed when two plates collide?
If two tectonic plates collide, they form a convergent plate boundary. … The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary. When two plates are moving away from each other, we call this a divergent plate boundary.How does the ocean floor keep track of magnetic fields?
These changes in strength and direction of the Earth’s magnetic field are recorded in the volcanic rocks beneath the seafloor. When hot lava erupts on the ocean floor and cools it not only crystallizes, but it also becomes magnetic. This is because the magma that seeps from the Earth’s mantle has a lot of iron in it.
What does the glaciers grooves found in Africa indicates?
Also, glacial striations (essentially ‘cut marks’) found in rocks from the movement of this ice sheet show that the direction in which it was moving was outwards from a central point in southern Africa. If the continents are set adjacent to one another at the south pole, these striations line up with each other.
How did Pangea split?
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. … About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland.How do earthquakes prove plate tectonics?
Where plate pull apart, slide by each other or collide, there is tectonic activity manifested as earthquakes. The great majority of seismicity on the planet occurs at plate boundaries, although intra-plate seismicity can occur as well when stresses build up in the plate.
What plate boundary formed the Red Sea?
The Red Sea Rift was formed by the divergence between the African Plate and the Arabian Plate. The rift transitioned from a continental rift to an oceanic rift.
What type of plate boundary is the Red Sea?
divergent boundary
Explanation: The Red sea is the result of a divergent boundary, while the Red Sea is not yet an ocean the process is very clearly the beginning of an Ocean. The mid atlantic ridge, is a divergent boundary. The evidence of sea floor spreading is convincing that the ocean is spreading out in both direction.What plate boundary exist at the Red Sea?
The Afar region in Northern Ethiopia is the centre of a “Y” shaped rift system, where the continental lithosphere is being stretched and is splitting. The Arabian Plate is rifting away from the African plate along an active divergent ridge system, to form the Red Sea and Gulf of Aden.
Why did the Mediterranean sea dried up?
Approximately five million years ago, the Mediterranean Sea dried up after it was sealed off from the Atlantic Ocean. According to earth scientists, a reduction in the weight on the Earth’s crust led to the Straits of Gibraltar moving upwards.
Why is the Mediterranean sea so salty?
Due to the high temperatures in the Mediterranean region, evaporation of the Mediterranean Sea occurs more rapidly than in other bodies of water, therefore more salt is left behind. The warm, dense, salty water in the Mediterranean is replaced by less salty and dense Atlantic water in the Strait of Gibraltar.
