Which of the following is NOT a test used to identify minerals?
A. Luster
B. Cleavage
C. Melting point
D. Streak

Since ocean waves have a lot of energy, they might cause a lot of erosion. Platforms, arches, and sea stacks are examples of landforms created by erosion.

Sand that has been transported will eventually end up on beaches, spits, or barrier islands.

Sand dunes, spits, bars, and sandy and pebbled beaches are all coastal landforms created by deposition.

deposition A deposition bar or beach landform off the shores of lakes or coasts is known as a spit or sandspit. It develops as a result of longshore drift caused by longshore currents in locations where re-entry takes place, such as the headlands of a cove.

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Subduction zones occur at convergent plate boundaries where two tectonic plates move towards each other.

Subduction zones occur at convergent plate boundaries where two tectonic plates move towards each other. One plate is usually denser than the other and subducts or sinks beneath the other plate, forming a deep trench. The subducting plate is usually an oceanic plate while the overriding plate can be either an oceanic or a continental plate.

As the oceanic plate subducts, it heats up and melts, forming magma. The magma rises and can trigger volcanic eruptions, leading to the formation of volcanic

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Answer:

Measuring the Circumference of the Earth. More than 2,000 years ago Eratosthenes compared the position of the Sun's rays in two locations to calculate the spherical size of the Earth with reasonable accuracy. Eratosthenes was born in the Greek colony Cyrene, now the city of Shahhat, Libya.

Explanation:

Fracture zones are orientated in relation to the mid-ocean ridge's axis because they run perpendicular to it.

A linear feature on the ocean floor called a fracture zone is created by the action of offset mid-ocean ridge axis segments. Fractures zones can be hundreds or even thousands of kilometres long. As a result of plate tectonics, they exist. When a transform fault is active, the lithosphere on each side of it shifts in the opposite direction; this is called strike-slip activity. Since both plate segments are moving in the same direction, the transform faults are seismically inactive, but fracture zones that extend past them provide signs of prior transform fault activity, particularly in the various ages of the crust on either side of the zone Although technically not "fracture zones," numerous transform faults linked with them are frequently regarded to informally as such.

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Answer: As an area is impacted by rising sea-level, land subsidence and increase in ocean elevation can cause flooding in areas not previously threatened by high tides. Flooding can occur during exceptionally high tides within annual fluctuations or when strong prevailing winds pile water against the shoreline.

Explanation:

The Suez Canal is a marvel of engineering that links the Mediterranean Sea to the Red Sea.

It connects the Mediterranean Sea to the Red Sea, the Indian Ocean, and the Red Sea across a 120-mile man-made waterway. It is one of the most crucial shipping lanes in the world since it enables ships to go between Europe and Asia without having to go through Africa.

The Suez Canal Authority oversees the operation of the canal, which was built between 1859 and 1869. Ships with a draught of up to 160 feet may travel through the canal, which is maintained at a width of 205 feet and a depth of 79 feet.

The canal is a crucial commerce route that cuts the time it would take a ship to circle Africa and reach the Indian Ocean in half. The Suez Canal is also a significant source of cash for the Egyptian government, generating around $5 billion annually.

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The wind at a change direction from South East to South West due to Coriolis effect.

In most cases, the winds that prevail blow from east to west rather than from north to south. The Coriolis effect is responsible for this phenomenon, which takes place as a direct result of the rotation of the Earth. Because of the Coriolis effect, wind patterns in the Northern Hemisphere rotate counter-clockwise, whereas wind patterns in the Southern Hemisphere rotate clockwise.

A cyclone is a low-pressure phenomenon that draws air into its center, often known as its "eye." Fluids coming from high-pressure systems in the Northern Hemisphere go to the right, passing low-pressure systems on their way. When air masses are pulled into cyclones from all directions, they are deflected, and this gives the impression that the storm system, in this case a hurricane, is rotating in the opposite direction of clockwise. Currents are deflected to the left in the Southern Hemisphere because to the Earth's tilt. As a direct consequence of this, storm systems appear to rotate in a clockwise direction.

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Faults connecting two regions of plate convergence or divergence are known as transform borders. These continental borders typically have zigzag patterns along their margins.

The science of hydrography analyses, quantifies, and explains the physical characteristics of bodies of water and the surrounding terrain. The U.S. Coast Survey, the forerunner of NOAA, was founded in 1807 by President Thomas Jefferson to carry out hydrographic studies and produce nautical charts of the ports and waterways of the nascent nation. In the past, ships would sound the depth by lowering a lead line from the ship until it struck the bottom and became slack.

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Answer:

I believe its C. the force of earths shifting plates is very powerful

Option b) magnitude  property of earthquakes does the richter scale measure

An earthquake (also known as a quake, tremor, or temblor) is the shaking of the Earth's surface caused by a sudden release of energy in the Earth's lithosphere, which produces seismic waves. Earthquakes can range in intensity from those that are so minor that they are not felt to those that are powerful enough to propel objects and people into the air, damage critical infrastructure, and devastate entire cities.

The frequency, type, and size of earthquakes experienced in a given area are referred to as its seismic activity. Seismicity at a specific location on Earth is defined as the average rate of seismic energy release per unit volume. Tremor is also used to describe non-earthquake seismic rumbling.

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Convection currents are used to describe the movement of warm and cold fluid caused by convection. When a heat source warms a cold fluid, a convection current develops.

Natural heat transfer methods like convection currents entail moving energy and heat from one place to another. As an illustration, consider the warmth we feel when holding our hands close to a bonfire. Currents caused by convection are to blame.

Convection is the needs to start of a single or multiphase fluid resulting from the interaction of a fluid's body forces, most frequently density and gravity, and its material property heterogeneity. Differential heating leads to convection currents. The initially chilly fluid warms up and rises. Since warm fluid is less dense, it rises.

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Caesar Augustus, also known as Octavian, was the first Roman emperor; he reigned from 27 BC until he died in AD 14.

The first Roman emperor, Caesar Augustus, often known as Octavian, ruled from 27 BC until they died in 14 AD. He is regarded as one of the greatest leaders in human history and is best known for founding the Roman Principate, the first stage of the Roman Empire.

Assassination schemes were not unfamiliar to Augustus. Thankfully, Augustus avoided the fate that befell his adopted father, Julius Caesar. At the age of 75, Augustus passed away naturally on August 19, 14 CE.

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The city is Little Rock, Arkansas, is a city where nine pupils attend a public high school.

The Little Rock, Arkansas, school board devised a strategy for the gradual integration of its schools in response to the Brown rulings and pressure from the neighbourhood NAACP branch. The high schools would be the first institutions to integrate, starting in September 1957.

The Little Rock Nine entered at Little Rock Central High School in the summer of 1957; the school had previously only had white students. The U.S. Supreme Court's ruling in Brown v. Board of Education (1954), which had ruled segregated schools to be unconstitutional, supported the students' effort to enrol. The altercation in Little Rock brought racism and civil rights in the United States to the attention of the world.

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Air masses are large bodies of air that have similar temperature and humidity characteristics. They are formed over large areas and can affect weather by bringing in different temperatures, humidity levels, and precipitation.

Large bodies of air called air masses share comparable properties of temperature and humidity. They are created over broad areas and have the power to change the weather by bringing in various temperatures, degrees of humidity, and precipitation. In contrast, a cold, dry air mass from Canada can bring in chilly temperatures and low humidity levels. As an illustration, a warm, humid air mass from the Gulf of Mexico can bring in warm temperatures and high humidity levels.

Large amounts of air that are typically the same temperature and pressure are called air masses. Different pressures and temperatures characterize unstable air masses. Storms can be produced by unstable air masses, such as this one over the German North Sea.

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Answer:

An air mass is a large body of air that has similar temperature and humidity across its whole area. These air masses form over large bodies of land or water, and they are the main determinant of the weather in a given region. Air masses affect the weather by influencing the temperature, humidity, air pressure, and wind. For example, cold air masses can cause winds to blow from the north, resulting in cold and dry weather. Warm air masses on the other hand, bring warm, moist air that can result in more moderate temperatures as well as rain or thunderstorms.

According to current estimates, OPEC Member Countries own 80.4% (1,241.82 billion barrels) of the world's proven oil reserves, with the Middle East holding the majority of these reserves at 67.1% of the OPEC total.

With an estimated 836 billion barrels of proven oil reserves in the Middle East in 2020, the region accounts for nearly half of the world's total proven oil reserves. The Americas retained reserves of more over 560 billion barrels that year, meanwhile.

However, there are also supergiant (>10 billion bbls) oilfields in Brazil, Mexico, Venezuela, Kazakhstan, and Russia. The majority of the world's largest oilfields are found in the Middle East.

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The direction of the wind can change from day to night due to the difference in the heating of the Earth's surface during these times.

During the day, the sun heats the surface of the Earth, causing the air near the surface to warm and rise. This creates an area of low pressure near the surface, which draws in cooler air from surrounding areas. This movement of air is known as convection, and it often results in wind blowing from cooler areas to warmer areas.

At night, the opposite occurs. The surface of the Earth cools down, and the air near the surface also cools and becomes denser. This creates an area of high pressure near the surface, which pushes air away from the surface and toward areas of lower pressure. This can result in the wind blowing in the opposite direction compared to during the day.

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Approximately 10% of the Earth's surface is covered in snow and ice.

This includes both permanent ice and snow cover, such as the polar ice caps, and seasonal snow cover, which varies depending on the time of year and location.

The majority of the Earth's permanent ice and snow is located in Antarctica and Greenland, which together hold about 99% of the world's ice. The remaining 1% of permanent ice and snow is found in mountainous regions around the world, such as the Himalayas, Andes, and Alps.

Seasonal snow cover is more widespread and occurs in regions with colder climates, such as in high latitudes and elevations. This snow cover typically melts during the warmer months and reaccumulates during the winter.

The amount of snow and ice cover on the Earth's surface can vary due to factors such as climate change and natural climate variability. The melting of glaciers and sea ice due to rising temperatures has become a significant concern in recent years, as it can lead to rising sea levels and other environmental impacts.

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If all the glaciers and ice sheets on Earth were to melt completely, the sea level would rise by approximately 70 meters, or 230 feet.

Glaciers and ice sheets are vast bodies of ice that are found in polar regions, high-altitude areas, and at high latitudes. They are formed over thousands of years as snow accumulates and compresses into dense ice. These ice formations are important for regulating the Earth's climate, and they provide freshwater to many parts of the world.

If all of the glaciers and ice sheets on Earth were to melt completely, the sea level would rise by approximately 70 meters (230 feet). This is because the ice on land contains a huge amount of water - in fact, it is estimated that if all of the ice on Earth were to melt, it would raise the sea level by about 216 feet (66 meters). This would inundate many low-lying coastal areas around the world, displacing millions of people and causing billions of dollars in economic damage.

While it is unlikely that all of the ice on Earth will melt in the near future, the effects of melting glaciers and ice sheets are already being felt. The global sea level has risen by about 8 inches (20 cm) since 1880, and it is projected to rise even more in the coming decades. This is primarily due to the melting of glaciers and ice sheets, as well as the thermal expansion of seawater due to global warming.

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Answer:

Fish will get dehydrated and may die. This is due to osmosis.

Explanation:

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True. The Chicxulub crater is a massive impact crater beneath Mexico's Yucatán Peninsula.

One of the biggest known impact craters on Earth, the crater is thought to measure 180 kilometres (110 miles) in diameter. It is thought to have been created 66 million years ago by the collision of an asteroid or comet.

At the end of the Cretaceous epoch, the mass extinction of dinosaur species is largely believed to have been caused by this event. The crater is thought to have been produced by an asteroid or comet with a diameter of 10 to 15 kilometres (6 to 9 miles) striking the Earth at a speed of 20 kilometres per second (45,000 mph).

The heat from the collision destroyed the asteroid or comet and melted the rocks, producing a huge cloud of dust that obscured the sun and drastically reduced temperatures.

As a result, there was a period of significant climatic change, which is considered to be one of the main reasons for the mass extinction event.

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Terrestrial planets are expected to form closer to the sun in the solar nebula.

This is because the temperatures are higher closer to the sun, leading to the formation of rocks and metals. As a result, the building blocks for terrestrial planets, such as silicates and metals, would be more abundant in this region.

Additionally, the gas and dust particles are denser closer to the sun, providing more material for the planets to form. Conversely, the outer regions of the solar nebula are colder and have more gas, leading to the formation of gas giants like Jupiter and Saturn.

The formation of planets depends on many factors, including distance from the star, temperature, and the abundance of building blocks, and the formation of terrestrial planets in the inner regions of the solar nebula is consistent with current theories of planetary formation.

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Option (D) Subduction zone is the correct option.

It is a process where heavier/denser tectonic plate sinks underneath the lighter/less denser tectonic plate, forcing to melt and rise to the surface in the form of molten rock (known as magma).

The subduction zones are usually formed between convergent plate boundaries. such plates cause great destruction over the surface and often characterized by possessing large numbers/series of volcanoes. The 'Ring of Fire', located in pacific ocean is a classic example.

Hence, the overrun plate is subducted into the mantle and a part of which is melted.  It is generally believed that plates move around over the Asthenosphere.

The Theory of Plate Tectonics was devised by Alfred wegner in the 1920s. He tried to study the earth's dynamic interior structure.    

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The human development gap index values given in figure 3 may be a better measure of development than any of the measures given in figure 2 because these values capture the three critical aspects of life that include decent living, education, and a healthy life.

The Human Development Index is designed to measure three critical markers of human lives. These include access to knowledge, a decent lifestyle, and the length/quality of their lives. These markers are more inclusive when compared to the other markers in figure 2 which include birth and death rate, life expectancy, and literary rate.

So, while all of these are considered individually in figure 2, figure 3 captures them as a single measure known as the Human Development Index.

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The length of a 120° arc is 12.58m

The circumference of a circle equals the length around it, however, this cannot be used as a definition of the distance is defined in terms of straight lines, as it is in many beginning lectures. Under these assumptions, the circumference of a circle may be defined as the limit of the perimeters of inscribed regular polygons with an increasing number of sides. Circumference may be used to define both real-world objects and abstract geometric forms.

The circle's overall circumference is = 2πr

The total circle has 360°.  

Given arc has only 120°.

Hence,

= 2×22/7×120/360

= 88/7

=12.58

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The information provided in a weather map showing the jet stream can be used to identify which city has experienced a drop in temperature.  

The jet stream is typically depicted as a narrow band of strong winds at high altitudes, often shown in bright colors or bold lines on weather maps.The position and direction of the jet stream can have a major influence on local weather patterns, as it can carry cold or warm air masses from one region to another.When the jet stream is positioned over a particular region, it can cause temperatures in that area to drop.By analyzing the position and direction of the jet stream on a weather map, it is possible to determine which cities are likely to experience changes in temperature.If the jet stream is flowing from west to east, for example, then cities located to the west of the jet stream will generally experience warmer temperatures, while cities to the east will be cooler.If the jet stream is meandering or fluctuating, then the impacts on local temperatures can be more complex and difficult to predict.

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The correct answer is option d) rift zones. Rift zones are regions where the continents or the sea floor are pulling apart due to geological forces.

Divergent limits are another name for them. These zones are brought by by molten material rising from the Earth's mantle.

Rift zones are created as this molten material rises and pushes the continental plates apart. Both the ocean floor and the surface of the land include these zones. They frequently take the shape of broad valleys or hills on land. Linear depressions, ridges, and mountains on the ocean floor are signs of rift zones.

The movement of the tectonic plates on Earth results in the creation of rift zones, which is a natural process. The plates diverge as a result of this movement, creating rift zones.

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Cosine is the  trig function should we use to solve for x in the image below. Hence, option B is correct.

Trigonometry is the study of the relationships between the angles and the lengths of the sides of triangles

The six trigonometric functions are sin , cos , tan , cosec , sec and cot

Let the angle be θ, such that

sin θ = opposite / hypotenuse

cos θ = adjacent / hypotenuse

tan θ = opposite / adjacent

tan θ = sin θ / cos θ

cosec θ = 1/sin θ

sec θ = 1/cos θ

cot θ = 1/tan θ

Given data,

Let the triangle be ΔABC , where ∠B = 90°

Let the side AB be x

So , the adjacent side = x

The angle of the triangle ∠A is = 72°

So , θ = 72°

The hypotenuse AC = 8

And , by trigonometric relations , we get

cos θ = adjacent / hypotenuse

Substituting the values in the equations, we get

cos 72° = x / 8

Multiply by 8 on both sides, we get

x = cos 72° × 8

Now, cos 72° = 0.30901

Substituting the value of cos 72° , we get

x = 0.30901 × 8

x = 2.472

Thus, option B is correct.

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