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2 years ago

In general, where do all the mega-earthquakes (8.0 or higher) occur on Earth?

Geography

2 answers:

AnnZ [28]2 years ago

8 0

Answer:

"The Big One" es un término utilizado en una conversación informal entre los habitantes de los estados estadounidenses de California, Oregón y Washington y la provincia canadiense de Columbia Británica para referirse al megaterremoto que se prevé ocurra en la zona de subducción de Cascadia. El nombre también ha sido aplicado a un megaterremoto que se espera golpee Tokio en la región de Kanto (Japón).

Mkey [24]2 years ago

6 0

Answer:

Subduction zone megathrust fault post Earth's largest earthquakes, along the multitude of smaller events that contribute to plate convergence.

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dmitriy555 [2]

Both are created by flowing water.

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3 years ago

Read 2 more answers

Describe the changes in the Arctic Sea Ice from 1979 to 2011

ch4aika [34]

Core samples from the ocean floor allow scientists to study layers of marine sediments laid down hundreds, thousands, even millions of years ago. Scientists have also studied the remains of algae, plants, and animals in the ocean floor or along coastlines. Ice cores pulled from deep within Arctic glaciers contain evidence of past temperatures and periods of cooling and warming. Even the distribution of ancient driftwood can provide clues about where there was open water and where there was ice.

Looking at these lines of evidence, scientists surmise that Arctic sea ice may have melted completely in summertime about 125,000 years ago, during a warm period between glaciations. As recently as 5,500 years ago, summertime Arctic sea ice may have been much less extensive than it is today. To estimate Arctic sea ice extent over the past millennium, scientists have used historical records. Where there have been people trading goods, chasing natural resources, or complaining about the weather, there have often been written accounts. Those records include ship logs, travel diaries, newspapers, government reports, even sheriffs' letters.Over time, written records have become more regular and detailed. Inhabitants of Iceland started noting sea ice conditions along the coast around 865 C.E. Government reports became routine in Iceland around 1600. Hudson's Bay Company began keeping regular logbooks of sailing conditions between Hudson Bay and England in 1751. Along the Northern Sea Route, Russian records of sea ice conditions survive from nearly every year since the late 1860s. Although these records do not match the comprehensive coverage of satellites, they have allowed modern scientists to reconstruct regional conditions, sometimes with impressive detail.

By the 1950s, shipping charts were regular and extensive enough to comprise a robust data set covering the Arctic Ocean. This data set is now available from the United Kingdom Met Office Hadley Centre. Hadley data show that Arctic sea ice has declined since at least the mid-1950s.Historical records and physical evidence pulled from the planet document multiple instances of natural variability in Arctic sea ice, on annual to multidecadal scales. The records also show that, by the early 20th century, Arctic sea ice was lower than it had been in the preceding centuries. The Hadley Centre data set shows a continued decline in sea ice. In other words, multiple lines of evidence show that Arctic sea ice was in decline well before the start of the continuous satellite record in 1979. Indeed, sea ice is less extensive now than it has been in several centuries.

The historical data also show how closely Arctic sea ice extent is linked to Earth's climate. When Arctic sea ice was lower, Earth's climate was much warmer than it is today, and sea level was higher than it is today. Leonid Polyak, a researcher at the Byrd Polar Research Center, said, "If that's where we are heading, we should be worried."

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2 years ago

By definition, two shapes are congruent if you can map one onto the other using rigid transformations (a sequence of one or more

MrRissso [65]

Answer:

The corresponding sides and angles of both the triangles [pre-image and the image] are congruent

Explanation:

7 0

3 years ago

Construct a concept sketch illustrating the main events in the history of life as observed from the fossil record. This sketch w

zvonat [6]

Answer:

Fossils are important features that are present in the sedimentary rocks. This provides evidence of how life has evolved over a large geological time scale.

Initially, the first life forms were unicellular, microorganisms, whose remnants are found to be present in the chert rocks of Australia, that are about 3.46 billion years old belonging to the Archean era.

Next to this, there occurred a new species, known as the trilobites which were first appeared in the Cambrian (540 million years back) and got extinct by the end of Permian (250 million years). These are found to be present in the Paleozoic rocks of Utah, the United States, and Oklahoma.

The next well-developed species existed were the dinosaurs, which first appeared in the Triassic, dominant in the Jurassic and got extinct by the end of Cretaceous. This involved the time from about 250 million years back to 65 million years back.

Thus, this is how life has evolved from simpler to complex organisms, including the present-day humans. This study of changes that occurs in the fossils found in the rocks from the bottom (older) to the top (younger) is considered as faunal succession, and the geologist evaluates the age of the rocks that comprises the distinct fossils.

An image has been attached below, showing the occurrence of different life forms namely microorganisms, trilobites, and dinosaurs in the geological history at different places on earth.

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3 years ago

Discuss the effects of global trade on countries

vladimir1956 [14]

Answer:

Global trade can have many fundamental effects on countries around the world. International trade results in the rapid development of countries and infrastructure. In addition, global trade can introduce new products and materials to countries, increasing development. This exposes countries to a variety of goods and services that were previously unavailable in their domestic economies. Imports from other countries also tend to lower consumer prices, which has a positive effect on global economies. Overall, global trade is central to the economic development of countries worldwide and positively impacts quality of living.

3 0

2 years ago