Activity 2.6
Name:
Course/Section:
Date:
Learning GOAL You will learn to interpret marine magnetic anomalies to infer the rate at which plates have diverged new lithosphere has formed along a mid-ocean ridge.
and
A Analyze the seafloor part of the map in Fig. A2.6.1, which depicts the area just off the Pacific Coast, west of California, Ore- gon, Washington, and southwest Canada. The colored bands are marine magnetic anomalies. Colored bands are rocks with a positive (+) magnetic anomaly, so they have normal polarity, like now. The white bands are rocks with a negative (-) mag- netic anomaly, so they have reversed polarity. Different colors indicate the ages of the rocks in millions of years, as shown in the magnetic polarity time scale provided.
-Colors indicate rocks of normal magnetic polarity (+), like now. The north-seeking end
of a compass needle would have pointed in the general direction of the geographic North Pole.
White areas have reversed magnetic polarity (-). At those
8 times, the north and south poles
exchanged positions. The north-seeking end of a compass would
have pointed in the general direction of the geographic South Pole.
TASK III: PALEOMAGNETIC STRIPES, SEAFOOR SPREADING AND SUBDUCTION
Study the Activity 2.6 and Figure A2.6.1 on page 57 of your manual. Answer the following questions (NOT in the manual). Hint: use the columnar paleomagnetic time scale next to the map for ages of seafloor rocks.
1. About how old are the rocks (in Ma) at point A? point B point C
2. What topographical feature would you expect to see on the sea bottom at point B?
3. What topographical feature would you expect to see on the sea bottom at point C?
4. What has been the average rate and direction of seafloor spreading in cm/yr west of the Juan de Fuca Ridge from B to A?
5. Notice that rocks older than 11 million years are present west of the Juan de Fuca Ridge, but not east of the ridge.
What could be happening to the seafloor rocks along line C-D that would explain why rocks older than 11 million years no longer exist on the seafloor east of the ridge?
6. Are the volcanoes of the Cascade Range related to this process?
How?
7. Name the plates on either side of the solid black, non-straight line that passes through C.
East of the line
West of the line
Answers
1. The rocks at point A are approximately 6 million years old. The rocks at point B are about 2 million years old. The rocks at point C are approximately 0.8 million years old.
2. At point B, we would expect to see a mid-ocean ridge or a divergent boundary. This is because the rocks in this area are relatively young (around 2 million years old), indicating the formation of new lithosphere due to seafloor spreading.
3. At point C, we would expect to see a trench or a subduction zone. This is because the rocks in this area are relatively old (around 0.8 million years old), suggesting that they have been subducted beneath another tectonic plate.
4. The average rate of seafloor spreading west of the Juan de Fuca Ridge from point B to point A can be determined by dividing the distance between the two points by the age difference of the rocks. Unfortunately, the specific values for the distance and age difference are not provided in the given information, so the rate cannot be determined.
5. The absence of rocks older than 11 million years on the seafloor east of the Juan de Fuca Ridge suggests that subduction is occurring in that area. As tectonic plates converge, older rocks are subjected to subduction and are recycled back into the Earth's mantle, leading to the absence of older rocks on the seafloor.
6. Yes, the volcanoes of the Cascade Range are related to this process. The Cascade Range is a volcanic mountain range that runs parallel to the subduction zone along the western coast of North America. The volcanoes in the Cascade Range are formed as a result of the subduction of the Juan de Fuca Plate beneath the North American Plate, leading to the melting of the subducted oceanic crust and the subsequent volcanic activity.
7. The solid black, non-straight line that passes through point C represents the boundary between the Juan de Fuca Plate and the North American Plate. East of the line is the North American Plate, and west of the line is the Juan de Fuca Plate. These plates are part of the larger Pacific Plate and are involved in the tectonic activity occurring in the region.
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Related Questions
Which is a way that interregional connections have affected cultural or economic development?
• A. Judaism became the most popular religion in the Middle East in
the 20th century.
• B. Middle Eastern countries became economically dependent on
other countries.
• C. Nationalism caused the split in the Austrian Empire.
• D. The Silk Road was used to move goods within Central Asia.
Answers
Middle Eastern countries became economically dependent on other countries have affected cultural or economic development.
Following the oil boom of the 1970s, Middle Eastern nations adopted a number of reform measures designed to maintain economic development and raise macroeconomic involvement. As oil price volatility threatened the economic stability of important oil exporting countries, the adoption of these economic changes became more crucial across the area. While each nation has its unique economic goals, many share common obstacles and concentrate on problems that have an impact on the whole area.
The policies place a focus on luring foreign investment in a globally interconnected economy. Countries in the Middle Eastern have also started putting measures into place to encourage regional integration. These are intended to support the stability of nations that have achieved greater rates of growth and development as well as assist the area realize its full economic potential.
Therefore, option B is the correct answer.
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What direction would gyres circulate in the northern hemisphere if earth rotated towards the west rather than towards the east?
Answers
If the earth were to rotate towards the west rather than towards the east, the direction of the gyres in the northern hemisphere would be reversed.
Currently, the Coriolis effect causes water to deflect to the right in the northern hemisphere, which results in clockwise circulation in the subtropical gyres and counterclockwise circulation in the subpolar gyres. If the rotation were reversed, the Coriolis effect would cause water to deflect to the left, resulting in counterclockwise circulation in the subtropical gyres and clockwise circulation in the subpolar gyres.
This change in direction would also affect ocean currents, weather patterns, and other oceanographic processes. However, such a reversal of earth's rotation is not physically possible and would have catastrophic consequences for life on earth.
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Milankovich cycles are oscillations in Earth's solar energy and variations in Earth's orbit occurring at 23,000 to 400,000 years. True or False
Answers
True. Milankovitch cycles are oscillations in Earth's solar energy and variations in Earth's orbit occurring at 23,000 to 400,000 years.
Milankovitch cycles are classified into three types: eccentricity, tilt, and procession. For starters, orbital eccentricity has the longest orbital cycle, lasting approximately 100,000 years. It refers to the transition of the Earth's orbit around the sun from a more circular to an elliptical shape.
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why do hydrophobic soils promote debris flows and flooding in regions recently burned by wildfires?
Answers
Answer:
Hydrophobic soils promote debris flows and flooding in regions recently burned by wildfires because the heat of the fire causes a synthetic waxy coating to form on the soil particles, reducing the soil's ability to absorb water. As a result, when a rainstorm passes through the area, water cannot be absorbed and instead accumulates on the surface, leading to flooding and debris flows.
Explanation:
recall from the previous activity which claims you think are best supported by evidence. use these claims to explain what is happening in galetown. you can use the data table and the words listed in the word bank above to help you with your report that answers the question: what caused galetown to have more severe rainstorms this summer than in previous years?
Answers
Based on the data table provided in the previous activity, I believe the claim that the increase in global temperature is contributing to more severe rainstorms is best supported by evidence.
This is because the table shows a clear trend of increasing temperatures in Galetown over the past few years, which could be causing more evaporation and moisture in the air, leading to heavier rainfall.Additionally, the claim that deforestation and urbanization in and around Galetown are causing more severe rainstorms also has some supporting evidence. The data table shows that there has been a decrease in forest cover in the area, which could be contributing to increased runoff and flooding during heavy rainfall events. Similarly, the increase in urbanization could be leading to more impervious surfaces, which prevent water from soaking into the ground and instead cause more runoff.
Overall, it seems that a combination of factors including increasing temperatures, deforestation, and urbanization are likely contributing to the more severe rainstorms seen in Galetown this summer. It is important for policymakers and individuals in the area to take steps to mitigate these factors and reduce the impacts of severe weather events.
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Answers
The Appalachian plateau is the region of Georgia that is found to be the only source of coal in the region.
What are the Appalachian plateaus?This is the term that is used to describe the North Western part of the Appalachian mountains. The regions that are contained here are known to stretch from the state of New York into Alabama.
Hence we can say that the The Appalachian plateau is the region of Georgia that is found to be the only source of coal in the region.
Complete question
which Georgia region is the only source of coal
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Please this is due soon!
Based on what you know about plate tectonics, how is it possible that scientists have discovered fossils of the same species in South Africa, India, and Australia? (Short answer please)
Answers
As long as there is no addition or removal of water vapor, the relative humidity of unsaturated (clear) air rises as the air temperature falls. Hence, on a clear, calm day, the relative humidity is ______ near sunrise, the coldest time of day.
dewpoint
precipitation point
frost point
Answers
\(\large\underline{\textsf{Background Information.}}\)
\(\textsf{In this scenario, there's a system that pushes down air from the atmosphere.}\)
\(\textsf{This air is usually dry, which resembles air you might see from a cold front,}\)
\(\textsf{however, since there are clear skies, this air warms up quickly due to the Sun.}\)
\(\large\underline{\textsf{Identifying the Best Option.}}\)
\(\textsf{From the options provided, we want to identify from the options provided what}\)
\(\textsf{the humidity is closest to.}\)
\(\large\underline{\textsf{What is Humidity?}}\)
\(\textsf{Humidity represents the percentage of water vapor in the air at a temperature.}\)
\(\textsf{Knowing what humidity is, we can say that the frost point is incorrect. Frost}\)
\(\textsf{point is the vapor pressure of water over a wet surface such as ice. Similar to}\)
\(\textsf{Dewpoint, it's also the vapor pressure of water however over a water surface.}\)
\(\textsf{Frost point is incorrect since we know nothing about the temperature outside}\)
\(\textsf{and precipitation point is incorrect since the conditions make it impossible for}\)
\(\textsf{any precipitation to form. It's also likely the "precipitation point" has been made}\)
\(\textsf{up. Therefore, the correct answer is \boxed{\sf dewpoint.}}\)
\(\large\underline{\textsf{Alternate Question:}}\)
\(\textsf{As long as there is no addition or removal of water vapor, the relative humidity}\)
\(\textsf{of unsaturated (clear) air rises as the air temperature falls. Hence, on a clear,}\)
\(\textsf{calm day, the relative humidity is \boxed{\sf ?} near sunrise, the coldest time of the day.}\)
\(\underline{\textsf{Answer Choices:}}\)
\(\textsf{Highest.}\)
\(\textsf{Lowest.}\)
\(\textsf{As the temperature falls, the humidity increases as the temperature is getting}\)
\(\textsf{closer to the dewpoint. Hence, the answer is \boxed{\sf highest.}}\)
\(\Large\boxed{\textsf{Answers:}}\)
\(\textsf{Hence, on a clear, calm day, the relative humidity is closest to the \boxed{\sf dewpoint}}\)
\(\textsf{near sunrise, the coldest time of the day.}\)
\(\textsf{Hence, on a clear, calm day, the relative humidity is \boxed{\sf highest}} \ \textsf{near sunrise, the}\)
\(\textsf{coldest time of the day.}\)
A line graph, titled Amount of Air Pollution Parcticles by State, shows Parts per trillion or p p t, and Years 2006 through 2015 for Virginia, Wyoming, North Carolina, Tennessee, and Maryland. The line for Wyoming starts at 5 p p t with little change, ending just below 5 p p t. The line for Virginia starts at 13 p p t and ends at 8 p p t. The line for North Carolina starts at 13 p p t and ends just below 9 p p t. The line for Maryland starts just above 13 p p t and ends at 10 p p t. The line for Tennessee starts near 13.5 and ends at 9 p p t.
Use the graph to answer the following questions.
Which state has the highest level of air pollution particles for the year 2014?
Which state shows the least change in air pollution particles from 2006 to 2015?
What action is most likely to have helped reduce the rate of air pollution particles?
Answers
Answer:
a. Maryland
b. Wyoming
c. Government regulations
Explanation:
For Wyoming, we have;
2006: 5 p p t
2015: < 5 p p t
For Virginia, we have;
2006: 13 p p t
2015: 8 p p t
For North Carolina, we have;
2006: 13 p p t
2015: 9 p p t
For Maryland, we have;
2006: 13 p p t
2015: 10 p p t
For Tennessee, we have;
2006: 13.5 p p t
2015: 9 p p t
a. Based on the linear graphs, the state that has the highest level of air pollution particles is given by the relation
\(2006 \, air \, polution \, values + \dfrac{(2015 \, air \, polution \, values)- (2006 \, air \, polution \, values)}{2015 - 2006} \times (2014 - 2006)\)
\(2006 \, air \, polution \, values + \dfrac{(2015 \, air \, polution \, values)- (2006 \, air \, polution \, values)}{9} \times 8\)
Therefore, for Wyoming, we have;
\(5 + \dfrac{(<5)- (5)}{9} \times 8 < 5 \ p \ p\ t\)
For Virginia, we have;
\(13 + \dfrac{8 - 13}{9} \times 8 = 8.6 \ p \ p\ t\)
For North Carolina, we have;
\(13 + \dfrac{9 - 13}{9} \times 8 = 9.44 \ p \ p\ t\)
For Maryland, we have;
\(13 + \dfrac{10 - 13}{9} \times 8 = 10.33 \ p \ p\ t\)
For Tennessee, we have;
\(13.5 + \dfrac{9 - 13.5}{9} \times 8 = 9.5 \ p \ p\ t\)
Therefore, Maryland has the highest level of air polluton particles for the year 2014
b. From the available data, Wyoming shows the least change in air pollution particles from 2006 to 2015 with a change from 5 p p t to < 5 p p t
c. Regulations which limit the amount of particles from pollutants that can be released into the Air.
Answer:
-Maryland
-Wyoming
-reduced burning of fossils fuels
Explanation:
This map shows the amount of groundwater (GW) in parts of Pakistan. Farmers in Pakistan once relied on rivers and canals for their water
supply, but as cities expanded and populations grew, more farmers used groundwater for their crops. When this map was made, there were no
laws restricting how many wells could be built in Pakistan to remove groundwater.
What would be the best solution to help Pakistan conserve their water supply?
eserved.
OA. Increase the number of groundwater wells in all three regions.
OB.
Build more wells in region 3, and restrict building in all other regions.
OC. Pass laws restricting well building in region 1, but increase wells in regions 2 and 3.
OD. Pass laws restricting all wells, with the fewest restrictions in Region 1.
IN
Reset
Next
tv♫ N
D
Answers
The best thing that Pakistan can do to conserve its groundwater is to D. Pass laws restricting all wells, with the fewest restrictions in Region 1.
How should Pakistan conserve groundwater?Restricting the construction of wells would ease the demand on the usage of groundwater.
All regions should therefore have these restrictions. As region 1 has the highest quantity of groundwater however, they can be subject to less restrictions because they can afford to use more water.
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Answer:
D.
Pass laws restricting all wells, with the fewest restrictions in Region 1.
of the following countries of australia/oceania, which is located farthest south?
Answers
Of the countries in Australia/Oceania, Antarctica, the continent and the smallest country, is the one situated farthest south.Antarctica, an isolated continent, is located in the southern hemisphere, specifically at 90° S latitude, making it the southernmost place on earth.
The countries in Australia/Oceania are a collection of island nations and continents located in the Pacific Ocean. The region is known for its abundance of marine life, coral reefs, and idyllic beaches. The countries of Australia/Oceania are situated in the southern hemisphere of the earth, with some located nearer the equator, while others are further south.
The continent is surrounded by the Southern Ocean and the Ross Sea, with the closest land mass being South America. As a result, it is known for its harsh climate conditions, which are unfavorable for human settlement. The continent is mainly characterized by ice sheets and mountains, with temperatures averaging -49°C (-56°F) in the winter. It is a significant research destination for scientists due to its geological and environmental features, and its location is vital for studies related to climate change.
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Can you predict what the
climate would be like if
Louisiana were closer to the
South Pole?
Plss help me
Answers
This bar chart shows unemployment rates for different countries.
Answers
oceanic crustal rocks are generally ________ than those found on the continents.
Answers
Oceanic crustal rocks are generally denser than those found on the continents. Denser materials are more massive and take up less space than less dense materials with the same volume. The reason why oceanic crustal rocks are denser than those found on the continents has to do with their chemical composition, age, and thickness.
The chemical composition of oceanic crustal rocks is different from that of continental crustal rocks. Oceanic crustal rocks are mainly composed of basalt, which is denser than the granite and other igneous rocks that make up continental crustal rocks. Oceanic crust is formed from magma that is generated at mid-ocean ridges and rises to the surface of the ocean floor. This magma is rich in iron and magnesium, which makes it denser than the magma that forms continental crustal rocks.Oceanic crustal rocks are also younger and thinner than continental crustal rocks. The average age of oceanic crustal rocks is about 200 million years, while continental crustal rocks can be as old as 4 billion years. This means that oceanic crustal rocks have not had as much time to cool and contract, which makes them less dense than older and thicker continental crustal rocks. Finally, oceanic crustal rocks are subjected to higher pressures and temperatures than those found on the continents. This causes them to become denser over time, as they are compressed and heated by the weight of the water above them.
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What's the seven Cartographic Conventions that should be on every math. I'll mark you as a Brainliest if you answer the question correctly.
Answers
Answer:
1. Title
2. Scale Indicator
3. Orientation (e.g North, South, East, West)
4. Border
5. Legends
6. Visual Contrast
7. Figure-ground
Explanation:
States sharing boundary with China
Answers
Answer: Jammu and Kashmir, Sikkim, Uttarakhand, Arunachal Pradesh and Himachal Pradesh
Explanation:
what is a earthquake and examples of haiti
Answers
An earthquake is a weak to violent shaking of the ground produced by the sudden movement of rock materials below the earth's surface. The earthquakes originate in tectonic plate boundary.
A magnitude 7.2 earthquake hit Haiti on August 14, 2021, stronger than the magnitude 7.0 quake that devastated the country in 2010. At least 2,200 people have died, more than 12,200 were injured, and hundreds remain missing. The earthquake severely damaged two cities, Le Cayes and Jeremic
u.s citites grew qulicky in the 1800s because
Answers
Answer:
rapid urbanization
Explanation:
I used a search engine
(10 sentence) Why is it important for Filipinos to be aware of the problems related to global warming and climate change?
Answers
It is important for Filipinos to be aware of the problems related to global warming and climate change as the country is at a risk to face such conditions.
Typhoons, flooding, landslides and other natural disasters are common in the nation and can be made worse by climate change and global warming. These occurrences may result in human and material losses, population displacement and economic harm.
Additionally, a large portion of Filipinos depend on agriculture and fishing for a living both of which are impacted by alterations in weather patterns and sea levels. Filipinos can take action to lessen the effects of climate change and global warming by practicing sustainable agriculture, reducing greenhouse gas emissions and adapting to shifting environmental conditions.
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Explain why being closer to the sun does NOT necessarily mean being warmer. Please use easy terms for a 6th Grader. Thank you *ASAP*
Answers
Answer:
The Sun is Radioactive So If You Get Near it Its Not necessarily warm its more radioactive which can end the life of any lifeform and cause cancer.
Explanation:
Question 4 (1 point)
The United States has the most free trade agreement with which continent?
a
Asia
b
Africa
с
Europe
The Americas
d
Next Page
Once you click Next Page you will not be able to change your answer
Answers
Answer:
Answer is (B)
Explanation:
please mark as brainlist
The United States recognizes that forest resources need to be used sustainably. Which of the following is an example of this?
A.
Clear cutting more forests for food production
B.
Manufacturing and using more tree-free paper
C.
Using more lumber to build homes
D.
Burning wood to produce electricity
Answers
Sustainably utilising resources implies manufacturing and using more tree-free paper, hence option B is correct.
What is Environmental Sustainability?Sustainability can be defined as solutions either industrial or world class that we take to make the environment habitable.
Sustainable solution can be either consumer facing or producer facing.
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Which detail from the text best supports the answer to Part A? A. “or the tributary lacing of / veins running through your / father’s hands.” ( Lines 3-5) B. “I wish / maps would be without / borders & that we belonged / to no one” ( Lines 10-13) C. “maybe we would call it / something more intrinsic / like forgiving or something” ( Lines 16-18) D. “el rio, how it dares to cover / up the bodies, as though we / would forget who died there” ( Lines 35-37)
Answers
Answer:
i think its either B or D, sorry:(
Explanation:
Which three major religions believe in one god
Answers
Answer: I believe it is Judaism, Christianity and Islam
Explanation:
Orogenesis is associated with compressional forces that producea. normal faultsb. reverse (thrust) faultsc. grabens
Answers
Orogenesis is a process of mountain building that occurs due to the compressional forces in the Earth's crust.
These forces can cause rocks to fold, fault, and deform, resulting in the formation of mountains. The process of orogenesis can create different types of faults, including normal faults, reverse (thrust) faults, and grabens, depending on the nature and direction of the forces. However, compressional forces primarily produce reverse (thrust) faults in which one block of rock is pushed up and over another block. This movement is often associated with the collision of tectonic plates, resulting in the formation of mountain ranges. In summary, orogenesis is a geological process that involves compressional forces and can produce different types of faults, but it primarily leads to the formation of reverse (thrust) faults and mountain ranges.
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Which nation has a command economy?
Cuba
Norway
South Korea
the United States
Answers
Answer:
i think us but not sure
Explanation:
Answer:
cuba
Explanation:
they have a dictator
Describe the structure of Afghanistan's government. (site 1)
Answers
Answer:
Its a Islamic republic
Explanation:
In simple words, Afghanistan can be understood as an Islamic republic with three divisions of government (executive, parliamentary, and judicial system), all of which are subject to checks as well as balances President Ashraf Ghani, who took over from Hamid Karzai from 2014, is the region 's leader. Their legislation is based heavily on the beliefs of Islam hence they are seen as an Islamic state.
Answer:
CREDITS TO THE OTHER GUY!!!!! Its a Islamic republic
Explanation:
In simple words, Afghanistan can be understood as an Islamic republic with three divisions of government (executive, parliamentary, and judicial system), all of which are subject to checks as well as balances President Ashraf Ghani, who took over from Hamid Karzai from 2014, is the region 's leader. Their legislation is based heavily on the beliefs of Islam hence they are seen as an Islamic state.
"A student made the following chart to prove that AB2 + BC2 = AC2.
Statement Justification
1. Triangle ABC is similar to triangle BDC 1. Angle ABC = Angle BDC and Angle BCA = Angle BCD
2. BC2 = AC × DC 2. BC ÷ DC = AC ÷ BC because triangle ABC is similar to triangle BDC
3. Triangle ABC is similar to triangle ABD 3. Angle ABC = Angle BAD and Angle BAC = Angle ABD
4. AB2 = AC × AD 4. AB ÷ AD = AC ÷ AB because triangle ABC is similar to triangle ABD
5. AB2 + BC2 = AC × AD + AC × DC
= AC (AD + DC)
6. Adding Statement 1 and Statement 2
7. AB2 + BC2 = AC2
Which of the first four steps is the error?"
Answers
Answer: There is no error in the first four steps. These steps are correctly stating and applying the properties of similar triangles. Specifically, if two triangles are similar, then their corresponding sides are proportional. This means that if we let AC/AB = x and AD/BC = x, then we can write AC/AB = AD/BC. From this, we can obtain the proportionality relationship AC/BC = AD/AB. This proportionality relationship can then be squared to obtain AC^2/BC^2 = AD^2/AB^2, which is equivalent to BC^2/AC^2 = AB^2/AD^2.
Explanation:
Question: How did geography shape the political development (structure of government) of ancient Greece
Answers
Answer:
The mountains isolated Greeks from one another, which caused Greek communities to develop their own way of life. Greece is made up of many mountains, isolated valleys, and small islands. This geography prevented the Greeks from building a large empire like that of Egypt or Mesopotamia.
Hoped this helped!
Andrija mohorovicic discovered the crust-mantle boundary, which is now named after him, because he realized that?
Answers
Andrija Mohorovičić discovered the crust-mantle boundary, now named after him, because he realized that seismic waves changed their velocity and behavior at that depth.
Andrija Mohorovičić, a Croatian seismologist, made the discovery of the crust-mantle boundary, now known as the Mohorovičić discontinuity or Moho, by studying the behavior of seismic waves during earthquakes. He observed that seismic waves exhibited a sudden change in velocity and behavior as they passed through a specific depth within the Earth's crust. This led him to deduce the presence of a distinct boundary between the Earth's crust and the underlying mantle.
The Moho marks the transition from the rigid, brittle crust to the more ductile and flowing mantle beneath. It is characterized by a change in seismic wave velocity due to differences in the physical properties of the two layers. Moho discontinuity is now recognized as a significant feature in Earth's structure and serves as an important boundary for understanding the composition and dynamics of the planet's interior.
Mohorovičić's discovery revolutionized our understanding of the Earth's internal structure and paved the way for further research on seismology and the study of Earth's geology. His recognition of the crust-mantle boundary has been a significant contribution to the field of Earth sciences.
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