What do the stripes in the paper represent in split and separate?
The stripes sported in the paper clearly represent the rock with both normal and reverse polarities. The activity with the title “split and separate” aims to discuss further the occurrence under the ocean particularly at the Mid-Atlantic Ridge.
What do the paper strips represent Brainly?
Answer Expert Verified The stripes sported in the paper clearly represent the rock with both normal and reverse polarities. The activity with the title “split and separate” aims to discuss further the occurrence under the ocean particularly at the Mid-Atlantic Ridge.
What do the slide slits represent?
Answer: The center slit stands for the passage where the molten material can enter the Mid-Ocean Ridge, formed by the converging of plates. The side slits stand for where subduction has occurred and the ocean floor has sunk in. Also, the space under the paper stands for the oceanic crust of the Earth.
What do the stripes on the strips stand for why is it important that your model have an identical pattern of stripes on both sides of the center slit?
Why is it important that your model have an identical pattern of strips on both sides of the center slit? The model has identical strips because, as the magma rises at the mid ocean ridge ½ goes to the right and ½ goes to the left of the mid ocean ridge. Each one of these strips represents Earth’s magnetic history.
Where is the famous seafloor spreading site?
mid-ocean ridge
What are the features of seafloor?
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 seafloor called?
seabeds
Where are the deepest seafloor features usually located?
The deepest parts of the ocean are within the subduction trenches, and the deepest of these is the Marianas Trench in the southwestern Pacific (near Guam) at 11,000 m (Figure 18.5).
Why is it important to study the shape of the seafloor?
Sea floor sediment provide an invaluable key to past climate change. Finely varved sediments from areas of rapid deposition provide a high-resolution record of past climate variation, and volcanic ash layers contribute to the comprehensive study of climate change on relatively short timescales.
What is the importance of seafloor spreading?
Today it refers to the processes creating new oceanic lithosphere where plates move apart. Seafloor spreading replaces the lithosphere destroyed by subduction, and exerts important influences on Earth’s chemical and biological evolution.
What type of sediment is most abundant?
lithogenous
What are the 4 types of sediments?
Sediments are also classified by origin. There are four types: lithogenous, hydrogenous, biogenous and cosmogenous. Lithogenous sediments come from land via rivers, ice, wind and other processes. Biogenous sediments come from organisms like plankton when their exoskeletons break down.
What are the two most abundant sediment types and where are they found?
1) Terrigenous Sediments: These sediments originate from the continents from erosion, volcanism and wind transported material. These are the most abundant sediments. 2) Biogenous Sediments: These are sediments derived from critters. *These include calcareous (most skeletons) and silicious (diatoms) compositions.
What is Lithogenic sediment?
Lithogenic Sediments: Detrital products of pre-existing rocks (igneous, metamorphic, sedimentary) and of volcanic ejecta and extraterrestrial material. Also products of alteration during early chemical reactions within freshly deposited sediment.
What is Hydrogenous sediment made up of?
Hydrogenous sediments are created from chemical reactions in seawater. Under special chemical conditions, dissolved materials in seawater precipitate (form solids). Many types of hydrogenous sediments have economic value.
What is an example of Lithogenous sediment?
Examples of lithogenous sediment include volcanogenic sediments, glacial marine sediments, and abyssal clays. Volcanogenic sediments are found near convergent volcanic arcs or hot spots.
Where is Hydrogenous sediment found?
Hydrogenous sediments are sediments solidified out of ocean water. As such, chemical reactions create these kinds of sediments. The precipitation of dissolved chemicals from seawater. These kinds of sediments are found commonly near hydrothermal vents.
Which is classified as Cosmogenous sediment?
Cosmogenous sediment is derived from extraterrestrial sources, and comes in two primary forms; microscopic spherules and larger meteor debris. These high impact collisions eject particles into the atmosphere that eventually settle back down to Earth and contribute to the sediments.
What is required for a marine sediment to be considered Biogenous?
If the sediment layer consists of at least 30% microscopic biogenous material, it is classified as a biogenous ooze . The remainder of the sediment is often made up of clay .
How is sediment measured?
The simplest way of taking a sample of suspended sediment is to dip a bucket or other container into the stream, preferably at a point where it will be well mixed, such as downstream from a weir or rock bar. The sediment contained in a measured volume of water is filtered, dried and weighed.
What are some examples of sediment?
Common sedimentary rocks include sandstone, limestone, and shale. These rocks often start as sediments carried in rivers and deposited in lakes and oceans. When buried, the sediments lose water and become cemented to form rock. Tuffaceous sandstones contain volcanic ash.
What is the most common medium for sediment transport?
Water
What controls how much sediment a river can carry?
The two main flow factors in sediment transport are the settling rate and the boundary layer shear stress 27.
What are two main sources of the sediment that rivers and streams carry?
The two main sources of the sediment carried by the streams and rivers are from the mass movement and runoff.
What are the different activities that can put too much sediment in the river?
Sediments can occur in water bodies naturally, but they are also produced in large amounts as a result of land-use change and agriculture. Activities such as farming, clearing forests, building roads, and mining can put too much soil and particulate matter in rivers.
What three actions are performed by a river?
There are three main types of processes that occur in a river. These are erosion, transportation and deposition.
What is it called when a river erodes downwards into its bed?
Attrition – wearing down of the load as the rocks and pebbles hit the river bed and each other, breaking into smaller and more rounded pieces.
What are the processes of erosion in a river?
There are four types of erosion: Hydraulic action – This is the sheer power of the water as it smashes against the river banks. Air becomes trapped in the cracks of the river bank and bed, and causes the rock to break apart. Abrasion – When pebbles grind along the river bank and bed in a sand-papering effect.
What does Corrasion mean?
A process of erosion, corrasion refers to the strictly mechanical wear of bedrock by moving detrital and other materials during (a) their migration downslope under the influence of gravity, and (b) their further transportation by erosional agencies such as running water, moving ice, or wind.
What is another name for Corrasion?
What is another word for corrasion?
| erosion | attrition |
|---|---|
| corroding | decay |
| rotting | sapping |
| waste | wearing away |
| detrition | eating away |