Answer:
belong to the same family of animals; the Felidae family
Explanation:
These animals first began to evolve 25 million years ago and have become the most highly-developed carnivorous hunters of all the mammals.
Answer:
Explanation:
All cats, from our own pet moggies to lions and tigers, belong to the same family of animals; the Felidae family. These animals first began to evolve 25 million years ago and have become the most highly-developed carnivorous hunters of all the mammals.
the following term describes a tax paid when purchases are made on a specific good, such as gasoline:
The term that describes a tax paid when purchases are made on a specific good, such as gasoline, is called an excise tax.
Excise taxes are a type of indirect tax that is levied on specific goods, rather than on income or property. They are typically included in the price of the goods and are paid by the consumer at the time of purchase. Excise taxes are often used to raise the revenue for specific government programs, such as highway construction and maintenance, or to discourage the consumption of certain goods that are considered harmful, such as tobacco and alcohol.
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which of the following is not a significant factor contributing to the damage caused by an earthquake?
The proximity to a plate boundary is not a significant factor contributing to the damage caused by an earthquake. The correct option is b.
An earthquake is a sudden movement of rock materials beneath the earth's surface that causes the ground to shake violently or weakly. The tectonic plate boundary is where the earthquakes start. Aside from the earthquake's magnitude, other factors like population density, geology, the time it occurs, level of preparedness, etc. may also affect how much damage an earthquake causes. The correct option is b.
Ground shaking, ground rupture, landslides, tsunamis, liquefaction, destruction of livelihood, death, and injuries are the main aftereffects of earthquakes. Rain is not a result of an earthquake. Seismic waves, or shock waves, radiate in all directions as the rocks shatter at the focus. The epicenter is the location on Earth's surface that is directly above the focus. The majority of the damage happens here.
The question is incomplete, complete question "which of the following is not a significant factor contributing to the damage caused by an earthquake? a. local geographical condition b. proximity to a plate boundary c. location"
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how is the stratosphere formed
Answer:
Stratosphere or Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere.
*You have observed that, there are variations in your environment in relation to natural,cultural and social phenomenon. Example all vegetation kinds are not the same. Geography is the study of Arial differentiation. Write for or against the motion.*
Answer:
Explanation:
For the motion: Geography is the study of aerial differentiation and understanding the variations in natural, cultural, and social phenomena in our environment is crucial for effective geographical analysis and decision-making.
Geography is a field of study that is concerned with understanding the spatial relationships between various physical and human phenomena in our environment. One of the central concepts of geography is aerial differentiation, which refers to the differences and variations in the environment that occur across different areas.
For example, variations in vegetation types, soil types, landforms, and climate can have a significant impact on the distribution and abundance of different animal and plant species, as well as on human activities such as agriculture and resource extraction. Similarly, cultural and social differences across different regions can have a profound impact on local economies, politics, and social structures.
By studying aerial differentiation, geographers can gain a better understanding of how natural, cultural, and social phenomena interact and influence each other. This can help us to identify patterns and trends in our environment and to develop more effective strategies for managing resources, addressing environmental challenges, and promoting sustainable development.
Against the motion: While aerial differentiation is an important concept in geography, it is not the only aspect of the field and should not be overemphasized to the detriment of other important areas of study.
Geography encompasses a wide range of topics and sub-disciplines, including physical geography, human geography, environmental geography, and more. While aerial differentiation is an important part of physical geography, other sub-disciplines such as human geography focus more on the social and cultural aspects of geography.
Moreover, while studying the variations in natural, cultural, and social phenomena is important, it is not always necessary to focus exclusively on aerial differentiation. For example, researchers might focus on understanding the patterns and trends in cultural practices, economic systems, or political structures, without necessarily emphasizing the variations in the physical environment.
In conclusion, while aerial differentiation is an important concept in geography, it should not be overemphasized to the detriment of other important areas of study. A holistic approach that considers the interplay between physical, cultural, and social factors is necessary for a comprehensive understanding of the world around us.
Which of the following types of diffusion is fueled by social media?
Hierarchical diffusion
Contagious diffusion
Stimulus diffusion
Economic diffusion
Relocation diffusion
Answer:
Contagious diffusion is fueled by social media.
Explanation:
hope this helps
Using this earthquake hazard map for the United States, determine which area in the list below has the highest earthquake hazard.
the Washington coast
Using this earthquake hazard map for the United States, the Washington coast has the highest earthquake hazard.
When two earthen blocks abruptly move past one another, an earthquake results. The fault, also known as the fault plane, is the area where they slide. The epicentre is the point on the earth's surface that is directly above the hypocenter, which is where the earthquake begins under the surface. Foreshocks can occur during an earthquake. There are lesser earthquakes that take place in the same location as the one that follows the major one. Until the greater earthquake occurs, scientists are unable to determine whether an earthquake is a foreshock. The mainshock is the term used to describe the greatest earthquake.
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true/false. Lava domes form when high-viscosity magma with low-volatile content cools quickly, forming a hardened dome a few meters to a kilometer or so in height.
False. When low-viscosity magma with a high volatile content cools slowly, it builds up into dome-shaped structures that can grow to heights of several kilometers.
Lava domes are made of viscous magma that is difficult to move and frequently contains significant volumes of gas and volatile substances like water vapour. When a volcano erupts, this magma cools and hardens on the surface, forming a dome shape while more magma continues to flow out and accumulate. The dome-shaped structure is a result of the magma's inability to travel far from the vent due to its extreme viscosity. Lava domes are frequently found in stratovolcanoes and are typically connected to violent eruptions.
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Please choose the correct answer.a) For a given mass of water vapor in an air parcel, the specific humidity changes as the parcel volume changes.b) For a given mass of water vapor in an air parcel, the absolute humidity changes as the parcel volume changes.
Option a) is the correct answer. For a given mass of water vapor in an air parcel, the specific humidity changes as the parcel volume changes.
Specific humidity is defined as the mass of water vapor present in a given mass of moist air, while absolute humidity is defined as the mass of water vapor present in a unit volume of moist air. When the volume of an air parcel changes, the mass of water vapor remains constant, but the specific humidity changes because the total mass of moist air has changed. Absolute humidity, on the other hand, is dependent on the volume of the air parcel and will change as the volume changes. Therefore, option a) correctly describes the relationship between specific humidity and parcel volume for a given mass of water vapor in an air parcel.
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Describe the landscape features that are produced by glacial erosion
Answer:
Glacial erosion is the process by which glaciers move and carve the land beneath them, resulting in a variety of distinct landscape features. Some of the landscape features produced by glacial erosion are:
U-shaped valleys: Glaciers erode valleys into a characteristic U-shape by gouging and plucking rocks and sediment from the valley floor and sides.Cirques: A cirque is a steep-walled, bowl-shaped depression at the head of a valley, formed by glacial erosion. The ice carves the walls and floor of the cirque, and it often contains a small glacier or a glacial lake.Fjords: Fjords are long, narrow inlets of the sea between steep cliffs. They are created by the slow movement of glaciers carving out valleys, which later fill with seawater.Roche moutonnée: Roche moutonnée is a rock formation created by glacial erosion that appears as a smooth and polished rock with a gentle slope on the side facing the direction from which the glacier came and a steep slope on the opposite side.Striations and grooves: These are parallel scratches and grooves found on bedrock caused by the movement of glacier ice over it.Erratics: Large boulders or rocks that have been transported and deposited by glaciers in areas where the rock type is different from the surrounding geology.Drumlin: A drumlin is a long, teardrop-shaped hill created by the accumulation of glacial till on the lee side of an obstacle or irregularity in the bedrock.When did Asians first begin migrating to the Guianas in large numbers?
after slavery was abolished
after the colonial system was ended
after bauxite deposits were discovered
after independence was won
Why Pluto left the solar system? What is the mass of Pluto?
Answer:
Pluto left the solar system because it was reclassified as a dwarf planet by the International Astronomical Union in 2006 due to its size and mass. Pluto's mass is estimated to be around 0.00218 Earth masses, or 1.30 x 10^22 kg.Answer:
Explanation:
Answer. The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet. Essentially Pluto meets all the criteria except one—it “has not cleared its neighboring region of other objects.
Which of the following lists has one rock from each major category (igneous, sedimentary, metamorphic) that contains quartz? basalt, limestone, greenstone basalt, sandstone, greenstone O granite, limestone, schist O granite, sandstone, gneiss
In order to include a rock from each main type (igneous, sedimentary, and metamorphic) that contains quartz, the proper response is "granite, limestone, schist."
In order to include a rock from each main type (igneous, sedimentary, and metamorphic) that contains quartz, the proper response is "granite, limestone, schist." Quartz is a common mineral found in all three igneous, sedimentary, and metamorphic rocks, including granite, limestone, and schist. Justification: Igneous, sedimentary, and metamorphic rocks all include the common mineral quartz. When magma or lava cools and solidifies, igneous rocks are created, and they can contain quartz, as in the case of granite. Sedimentary rocks, like limestone, are created by the accumulation of sediment and may also include quartz. Rocks that have undergone heat and pressure to change into metamorphic rocks can include
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How is the troposphere formed?
Answer:
The troposphere is the lowest layer of the Earth's atmosphere, extending from the surface up to about 7-20 km (4-12 miles) depending on the latitude and season. It is the layer where most of the Earth's weather occurs, and where we live and breathe.
The troposphere is formed by a combination of processes involving the Earth's surface and the Sun's energy. The Sun's radiation heats the Earth's surface, causing it to warm up and create thermal energy. This thermal energy is then transferred to the air molecules in contact with the surface, causing them to rise and expand. As the warm air rises, it cools and loses some of its moisture, which condenses into clouds and precipitation.
At the same time, cooler air from higher altitudes sinks down to replace the rising warm air. This creates a convective cycle, where warm air rises and cool air sinks, creating a mixing of the atmosphere that distributes heat and moisture.
The boundary between the troposphere and the layer above it, the stratosphere, is marked by a temperature inversion layer called the tropopause, where the temperature stops decreasing with height and begins to increase again. This is due to the absorption of ultraviolet radiation by ozone molecules in the stratosphere, which creates a warming effect that prevents the mixing of air between the two layers.
Explanation:
which of these reasons might result in the modern (human) development of a floodplain? (select all that apply.)
The modern development of a floodplain can be caused by natural river processes, human-induced changes to river systems, and climate change.
A floodplain may eventually form as a result of natural river processes such silt deposition, erosion, and channel migration.
Levees, dams, and other human-made changes to river systems, such as channelization, can alter the river's natural flow and result in flooding in places that weren't previously floodplains.
Climate change can lead to increased precipitation and extreme weather events, which can result in floods and the expansion of existing floodplains. It is possible for natural river processes like silt deposition, erosion, and channel migration to lead to the modern formation of a floodplain. Levees, dams, and other human-made changes to river systems, such as channelization, can alter the river's natural flow and result in flooding in places that weren't previously floodplains. Climate change can also contribute to increased precipitation and extreme weather events, leading in floods and the expansion of existing floodplains. Therefore, the modern development of a floodplain could be caused by any of the three causes.
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Currents tend to move in large ____ patterns in the Northern Hemisphere.clockwisecounterclockwiserandomirregular
The Northern Hemisphere has broad, anticlockwise patterns where currents often flow. The Coriolis effect, which results from the spinning of the Earth, is to blame for this.
Water and air, for example, curve to the right in the Northern Hemisphere and to the left in the Southern Hemisphere due to the Coriolis effect. Thus, currents in the Northern Hemisphere are redirected to the right, leading them to circle ocean basins in a clockwise pattern. In contrast, currents in the Southern Hemisphere are diverted to the left, which makes them circulate through ocean basins in a clockwise pattern.In the Northern Hemisphere, the Coriolis effect causes currents to be deflected to the right, and in the Southern Hemisphere, to the left. As a result, ocean currents tend to travel in big clockwise patterns in the Southern Hemisphere and enormous anticlockwise patterns in the Northern Hemisphere. These patterns are necessary for ocean circulation, which moves heat and nutrients all over the world and is essential to the Earth's climate system.
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true/false. wherever an equatorward-lowing cool current pulls away from a subtropical western coast, a pronounced and persistent upwelling of cold water occurs.
The given statement "wherever an equatorward-lowing cool current pulls away from a subtropical western coast, a pronounced and persistent upwelling of cold water occurs" is True because This upwelling brings cooler and nutrient-rich water to the surface, which encourages the growth of plankton and other marine life.
This type of upwelling can be seen in many regions, such as the California Current, Canary Current, Benguela Current, and Peru Current. Upwelling is also associated with kelp forests and other productive coastal ecosystems, which are important habitats for a variety of species.
In addition, upwelling can have a cooling effect on the atmosphere, helping to moderate air temperature and reduce the intensity of storms.
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Which of the following are common negative effects of channelization to the environment and ecosystems?Habitat acreage may be reduced.Wetlands may be drained.Water moves more quickly downstream.Stream flow patterns are disturbed.
Channelization frequently has detrimental consequences on aquatic ecosystems and species, including habitat loss, wetland damage, increased water flow velocity, and disturbed stream flow patterns.
The process of changing natural waterways, such as streams and rivers, to enhance flood management, navigation, and agriculture is referred to as channelization. However, this technique may have negative environmental effects, such as habitat loss because of reduced acreage, wetland destruction because of draining, increased water flow velocity, and altered stream flow patterns. These harmful outcomes may result in the disappearance of aquatic habitats, modifications to the water's quality, and impairment to the ecosystems and creatures that depend on these streams.
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based on these graphs, how has hunting caused evolution of bighorn sheep mass and horn length over time?
Because to selective hunting, the length of the horns on bighorn sheep has decreased while their body mass has increased. A greater body size allowed for increased reproductive success while smaller horns gave a survival advantage.
Reason: According to the graphs, hunting has put a selection pressure on bighorn sheep. Horn length has decreased over time as rams with longer horns have traditionally been targeted by hunters. The statistics also suggest a rise in body mass, which is most likely caused by smaller horned rams having an edge in survival and passing on their genes for higher body size to their offspring. In addition to improving reproductive success, this increase in body bulk has also made larger rams more likely to mate successfully. The evidence implies that bighorn sheep populations have evolved in response to hunting, with lower horns and larger body proportions becoming more common through time.
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Which of the following describes the value of a product? the difference between the cost of making the product and what consumers pay for the product the difference between the cost of making the product and what consumers pay for the product the amount of money that consumers are willing to pay for the product the amount of money that consumers are willing to pay for the product the time and materials that it costs a manufacturer to make the product the time and materials that it costs a manufacturer to make the product the sum of the total cost of making the product and what consumers pay for the product the sum of the total cost of making the product and what consumers pay for the product
The value of a product is described by the amount that customers are willing to pay for it.
What is the difference between the product's value and cost?The customer keeps the difference between the product's value and price as consumer surplus.
A product's value can be summed up as how satisfied customers are with it. The benefit that a product provides to the end user is what determines its value. Customers will always pay more for a product that has more advantages. Product and services that don't make customers happy are always in high demand, so their prices are low on the market.
A product's value can be expressed in terms of how much customers are willing to pay for it.
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All of the following would offer clues about an area's religion EXCEPT
A. clothing
B. architecture
C. type of government
D. literature
E. common occupation
Answer: C.
Explanation:
C. type of government would not offer clues about an area's religion. The other options may offer clues about an area's religion. For example, clothing can indicate religious practices, architecture can reveal the style of religious buildings and places of worship, literature can reflect the religious beliefs and values of the people, and common occupation can reveal whether certain occupations are influenced by religious practices or beliefs.
determine the hydraulic gradient between the storage drum and the threatened well (in feet per mile). (conversion factor: 1 mile
The horizontal hydraulic gradient between the storage drum and the threatened well at point H-5, R-21, and G-10 are 13.33 ft/mile, 195.74 ft/mile, and 18.739 ft/mile, respectively.
To calculate the horizontal hydraulic gradient between two points, we need to know the vertical difference in elevation and the horizontal distance between the two points. There are three well located in given map of military base:
1. At point H-5 (elevation of water = 601 ft)
2. At point R-21 (elevation of water table = 508 ft)
3. At point G-10 (elevation of water table = 589 ft)
And elevation of water table at storage drum is about 600 feet.
So,
⇒ Hydraulic Gradient = Difference in elevation of water table/distance between storage drum and well
∴
Horizontal hydraulic gradient between storage drum and well at H-5:
Gradient =
⇒ [tex]\frac{601-600 ft}{ 400 ft} \\= \frac{1 ft}{0.075 mile}[/tex]
⇒ Gradient = 13.33 feet/mile
Now,
Hydraulic gradient between storage drum and well at R-21:
⇒ [tex]Gradient = \frac{(600 - 508) ft}{0.47 mile} \\\\ = \frac{92}{0.47} ft/mile[/tex]
⇒ = 195.74 ft/mile
Now,
Hydraulic gradient between storage dam and well at G-10:
⇒ Gradient = [tex]\frac{(600-589) ft}{0.587mile}[/tex]
⇒ = [tex]\frac{11 ft}{0.587 mile\n}[/tex]
⇒ = 18.739 ft/mile
Therefore, the horizontal hydraulic gradient between both the storage drum as well as the threatened well at points H-5, R-21, and G-10 is thus 13.33 feet per mile, 195.74 feet per mile, and 18.739 feet per mile, respectively.
The complete question is
Determine the horizontal hydraulic gradient between the storage drum and the threatened well (in feet per mile). (Conversion factor: 1 mile = 5280 feet)
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which to new york state landscapes regents are for mostly of the surface that rock that is approximately the same
The two New York State landscape regions that are formed mostly of surface bedrock that is approximately the same geologic age are the Adirondack Mountains and the Catskill Mountains.
The Adirondack Mountains are composed of ancient Precambrian rocks that are approximately 1 billion years old, while the Catskill Mountains are primarily composed of sedimentary rocks that were formed during the Devonian period, approximately 350 million years ago. Both of these regions are located in upstate New York and are known for their natural beauty and geological significance. The Adirondacks are home to numerous peaks and lakes, while the Catskills are known for their scenic waterfalls and hiking trails.
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Which of the following conditions will tend to make rocks change by ductile deformation rather than by brittle deformation?Choose one:A. granitic compositionB. slowly applied stressC. position fairly close to Earth's surfaceD. cool surroundings
B. Rocks are more likely to undergo ductile deformation than brittle deformation when slowly applied tension is present. Rocks have a higher chance of deforming without shattering when tension is applied progressively over time.
On the other hand, quick, high-intensity stress can cause rocks to fracture or split due to brittle failure.Granitic makeup, proximity to the Earth's surface, and cold conditions may not always favour ductile deformation over brittle deformation. Although the composition of the rock, its depth, and its temperature can influence how it responds to stress, there is no clear correlation between these variables and ductile vs brittle deformation.than brittle deformation when slowly applied tension is present. Rocks have a higher chance of deforming without shattering when tension is applied progressively over time.
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true/false. when airborne pyroclasts rain down upon the landscape, with particles ranging in size from ash to bombs and blocks, a pyroclastic is occurring.
The given statement "when airborne pyroclasts rain down upon the landscape, with particles ranging in size from ash to bombs and blocks, a pyroclastic is occurring" is True because Pyroclastic is a term used to describe a volcanic eruption that produces a mixture of hot gas, ash, and rock fragments that are blown out from the vent.
These fragments are called pyroclasts and can range from very fine ash to larger blocks and bombs. The shape and size of these pyroclasts depend on their speed and cooling rate. Pyroclasts can travel great distances, sometimes up to several kilometers away from the vent, and can cause significant damage when they land.
Pyroclastic flows can also occur, which are much more destructive than an airborne pyroclastic, as they can travel down the side of a volcano and devastate everything in its path.
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how is the thermosphere formed?
Answer:
The thermosphere is formed by the transition of the mesosphere into the thermosphere, at an altitude of about 80 km. Incoming solar radiation causes temperatures to increase rapidly, leading to the formation of the ionosphere, a layer of charged particles. The ionosphere reflects radio waves back to Earth and protects the planet from harmful solar radiation. Solar activity can cause changes in the density and temperature of the ionosphere, affecting communication and satellite operations.
Explanation:
The thermosphere is the layer of the Earth's atmosphere that lies above the mesosphere and extends from about 80 kilometers (50 miles) to several hundred kilometers (up to 1000 km or 600 miles) above the Earth's surface. It is the layer where temperatures increase with altitude due to the absorption of ultraviolet radiation from the Sun.
The thermosphere is formed by the gradual transition of the mesosphere into the thermosphere, which occurs at an altitude of about 80 km. At this altitude, the atmosphere is thin enough that incoming solar radiation can cause the temperature to rise rapidly. This causes the air molecules to become highly energized and ionized, leading to the formation of a layer of charged particles called the ionosphere.
The ionosphere is important for communication and navigation because it reflects radio waves back to Earth, allowing long-distance communication. In addition, it protects the Earth from harmful solar radiation by absorbing the high-energy particles and breaking them down into harmless molecules.
The thermosphere is also influenced by solar activity, such as sunspots and solar flares, which can cause changes in the density and temperature of the ionosphere. These changes can affect radio communications and cause disruptions in satellite operations.
Overall, the formation of the thermosphere is a complex process that involves the interaction of solar radiation with the Earth's atmosphere, and it plays a vital role in protecting the Earth from harmful radiation and enabling long-distance communication.
City A is located at 30° north latitude, while City B is located at 30° south latitude. Which city is closest to the
equator?
A City A
B City B
C Both cities are equally close
D City A in winter, City B in summer.
NEED ANSWER ASAP PLSSS
metamorphic rock that contains no minerals. group of answer choices greenstone soapstone anthracite shale
None of the options given in the answer choices are metamorphic rocks that contain no minerals. All rocks, including metamorphic rocks, are made up of minerals.
Greenstone is a common name for a group of green-colored metamorphic rocks, typically composed of minerals such as chlorite, epidote, and actinolite.
Soapstone is a metamorphic rock that is primarily composed of the mineral talc, with varying amounts of other minerals such as micas, chlorite, and amphiboles.
Anthracite is a type of coal that is formed from the metamorphism of bituminous coal, and it consists mainly of carbon with small amounts of other elements like sulfur and nitrogen.
Shale is a sedimentary rock that is composed of clay minerals, quartz, feldspar, and other minerals.
So, the correct answer is none of the above.
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The GSSP concept was introduced in the ______, to provide accepted definitions for ______ units.
With the purpose of establishing generally agreed definitions for stratigraphic units, the GSSP (Global Boundary Stratotype Section and Point) concept was first proposed in 1977.
According to changes in the rock record and fossil assemblages, the GSSP specifically defines certain locations in a geological sequence that serve as reference markers for determining the beginning and end of geological time periods, such as epochs and stages. Geologists need these reference points in order to analyse and connect rock sequences from various parts of the globe and to provide a uniform framework for geological time scales.
The GSSP idea was initially put forward in 1977 to establish definitions for stratigraphic units that are universally recognised and approved and are based on changes in the rock record and fossil assemblages. The GSSP is crucial for comparing rock sequences across different parts of the world and for creating a uniform framework for geological time scales because it acts as a reference point for the beginning and end of geological time periods, such as epochs and stages.
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FILL IN THE BLANK. The heat created by the eruption of Nevado del Ruiz in 1985 melted _____ which then mixed with pyroclastic material to form a deadly lahar.
The heat created by the eruption of Nevado del Ruiz in 1985 melted Glaciers which then mixed with pyroclastic material to form a deadly lahar.
The heat created by the eruption of Nevado del Ruiz in 1985 melted snow and ice from the volcano's summit. This melted snow and ice then mixed with the pyroclastic material that had been ejected from the volcano during the eruption. This combination of water, ash, and rocks created an extremely powerful and destructive lahar that caused immense damage to the surrounding area.
The lahar was fast moving, reaching speeds of over 50 km/h and was capable of destroying homes and buildings in its path. It caused the deaths of more than 25,000 people, making it one of the deadliest volcanic eruptions in recorded history. The lahar also caused damage to infrastructure, including roads, bridges, and dams, resulting in a considerable economic loss for the region.
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What physical property would have made a mineral appropriate for use as an old-time window covering before glass was widely available? FEEDBACK: To be used as a window pane, a mineral needs to be split into thin, large layers. Soft, brittle layers would not be appropriate for window panes.
The mineral needs to be easily split into thin, large layers to be used as an old-time window covering before glass was widely available.
Until glass became commonly available, window coverings made of minerals like mica, calcite, and talc were common. The mineral had to be physically capable of easily splitting into broad, thin layers. Due to this characteristic, the material could be formed into a flat sheet that was both somewhat insulating and transparent enough to let light through. Minerals with brittle, fragile layers would not be suitable since they would shatter rapidly and could not resist environmental conditions or the strain of constant use. For producing an ancient window covering, a mineral with the ability to be easily split into thin, large layers was necessary.
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