The geologic time scale was devised before numerical dating using radioactivity was invented.TrueFalse
The given statement, "The geologic time scale was devised before numerical dating using radioactivity was invented." is true as Radioactive dating was made possible by the discovery of radioactive decay, although it would not be possible to determine ages accurately using radiometric dating methods until the mid-1950s.
The geologic time scale, often known as the geological time scale (GTS), is a depiction of time based on the rock record of Earth. It is a method of chronological dating that combines geochronology, a discipline of geology that seeks to ascertain the age of rocks, with chronostratigraphy, the process of connecting strata to time.
The timing and dating of events in the history of the Earth are predominantly described by Earth scientists. The study of rock strata, observation of their correlations, and identification of elements including lithologies, paleomagnetic characteristics, and fossils have been used to establish the geologic time scale.
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T/F Brazil shares common boundaries with every South American country
Answer:
False. Brazil does not share a border with Ecuador and with Chile.
True or False : Clear skies are associated with subsidence or sinking motion.
Its True because Clear skies are often associated with subsidence or sinking motion, which inhibits the formation of clouds and precipitation.
Clear skies are often associated with subsidence or sinking motion. When air sinks, it warms up and dries out, which can lead to the dissipation of clouds and the clearing of skies. This is because as air sinks, it experiences an increase in atmospheric pressure, which compresses the air and causes it to warm up. As the air warms, its capacity to hold moisture increases, which can lead to a decrease in relative humidity and the dissipation of clouds. So, in general, clear skies are associated with areas of high pressure and subsidence.
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What percent of the world's total species could be extinct by 2050?
a) 5%
b) 25%
c) 35%
d) 50%
e) 95%
according to the World Wildlife Fund (WWF), it is estimated that up to option D- 50% of the world's total species could be at risk of extinction by 2050 due to habitat loss, climate change, pollution, over-harvesting, and other human activities.
It's worth noting that the estimate of 50% is a projection based on current trends and does not take into account potential technological or policy changes that could mitigate the drivers of extinction. However, it is clear that many species are facing significant threats, and the rate of extinction is believed to be much higher than the natural background rate.
The loss of biodiversity can have significant ecological, economic, and social consequences. Species provide important ecosystem services such as pollination, nutrient cycling, and pest control, which are essential for human well-being. Biodiversity also has cultural and aesthetic value, and many species have important spiritual and symbolic significance for different communities around the world.
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The cloud droplets in a cloud are formed by water vapor molecules and:
-ions.
-protons.
-other water vapor molecules.
-molecules of air.
-condensation nuclei.
Cloud droplets in a cloud are formed through a process called condensation, where water vapor molecules in the air cool and come together to form liquid water droplets.
The correct answer is e) condensation nuclei.
However, for condensation to occur, the water vapor molecules need a surface to gather around, which is provided by tiny particles called condensation nuclei. These condensation nuclei can be solid particles, such as dust, pollen, or pollution particles, or even liquid particles, such as tiny water droplets or ice crystals.
Condensation nuclei serve as the "seeds" around which the water vapor molecules can gather and form cloud droplets. Without condensation nuclei, the water vapor molecules would remain in the gaseous state and not form visible cloud droplets. Therefore, condensation nuclei are an essential component in the process of cloud formation, allowing cloud droplets to form and contribute to the formation of visible clouds in the atmosphere.
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Frost that forms on cold glass is created by the process of:
-sublimation.
-transpiration.
-freezing.
-deposition.
Frost that forms on cold glass is created by the process of D. Deposition.
Deposition occurs when water vapor in the air comes into contact with a cold surface, such as a glass window, and transforms directly from its gaseous state into solid ice crystals. This change of state skips the liquid phase, meaning that the water vapor does not condense into liquid water before freezing.
Instead, it solidifies directly onto the cold surface as frost. Deposition is the opposite process of sublimation, which involves a substance transitioning directly from a solid to a gas without passing through the liquid phase. In contrast, transpiration is the process by which plants release water vapor into the atmosphere, and freezing is the transition from the liquid phase to the solid phase.
While freezing is involved in the formation of frost, it is not the direct cause, as the water vapor bypasses the liquid state altogether through the deposition. Therefore, the correct option is D.
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Frost that forms on cold glass is created by the process of:
A. sublimation.
B. transpiration.
C. freezing.
D. deposition.
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The lifting condensation level is the location of the _______.
-first place where rain begins
-first place where the parcel becomes colder than the environment
-top of the cloud
-first place where the air becomes saturated
-first place where the parcel becomes warmer than the environment
The lifting condensation level is the location of the first place where the air becomes saturated. Therefore the correct option is option C.
The lifting condensation level (LCL) is the height at which a rising air parcel becomes saturated, indicating that it can store as much water vapour as possible at a given temperature and pressure. Any further rising will result in the creation of clouds and possible precipitation at this point.
The initial temperature and moisture content of the air parcel, as well as the environmental lapse rate, which is the rate at which temperature changes with height in the surrounding atmosphere, determine the LCL. Therefore the correct option is option C.
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True or False: Freezing rain and sleet are both the same form of precipitation.
The process of adding a terrane to another landmass is called __________.
The process of adding a terrane to another landmass is called accretion.
When a segment of the crust, such as an island arc or a piece of oceanic crust, collides with and becomes linked to a continent or another landmass, this is referred to as accretion.
This process is common near convergent plate borders where tectonic plates collide, and it can result in the construction of mountains and other geological features.
The accreted terranes may become absorbed into the broader landmass over time, making their initial identity impossible to recognise. Accretion has shaped the Earth's surface and geologic history significantly.
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Strengths of the sub-saharan african city model
The Sub-Saharan African City Model is a useful framework for understanding the urban patterns and characteristics of cities in sub-Saharan Africa.
Some of its advantages are as follows:
Contextual: The model acknowledges that African cities have distinct characteristics and challenges that are formed by their distinct historical, political, and economic circumstances.The model emphasises the relevance of informal settlements in African cities, which are sometimes disregarded or stigmatised in other urban models. The concept takes a holistic approach, examining the social, economic, and environmental aspects that shape African cities.Recognising ethnic and linguistic variety: The model acknowledges the diversity of African societies and the significance of ethnicity and language in creating urban patterns.Provides a foundation for comparative analysis: The model provides a foundation for comparing African cities to one another and to cities in other parts of the world.For such more question on Saharan Africa:
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A cumulus cloud is recognized mainly by its:
layered structure.
darkness or color.
obvious vertical dimension.
association with high winds.
precipitation.
A cumulus cloud is recognized mainly by its obvious vertical dimension, which distinguishes it from other cloud types, and its layered structure. It may also produce precipitation.
A cumulus cloud is a particular kind of cloud that can be identified primarily by its distinct vertical dimension that sets it apart from other cloud varieties. It may have a layered appearance and be white or grey.
Although cumulus clouds are frequently linked to good weather, they can also bring on thunderstorms or showers of precipitation. Cumulus clouds may be accompanied by strong winds because of their connection to convective activity. These clouds can develop quickly in reaction to local heating and are frequent in warm, humid air masses.
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As liquid water is evaporated into the atmosphere, heat energy is:
-released by the evaporating water.
-absorbed by the evaporating water.
-absorbed by the surrounding air.
-given off by the water vapor.
-absorbed by the remaining liquid.
As liquid water is evaporated into the atmosphere, heat energy is B. absorbed by the evaporating water.
During evaporation, heat energy is absorbed from the surrounding environment, increasing the kinetic energy of the water molecules. As a result, the molecules with the highest kinetic energy are able to break free from the liquid's surface and become water vapor. This absorption of heat energy during evaporation is known as the latent heat of vaporization.
As the water absorbs heat energy and evaporates, the remaining liquid will often experience a cooling effect. This is because the molecules with the highest kinetic energy are the ones that escape into the atmosphere, leaving the lower-energy molecules behind. This cooling effect is utilized in many everyday applications, such as perspiration in humans, where the body produces sweat to help regulate temperature through evaporative cooling.
In summary, during evaporation, heat energy is absorbed by the evaporating water, allowing the water molecules to overcome intermolecular forces and transition from the liquid phase to the gaseous phase. This process also results in a cooling effect for the remaining liquid. Therefore, the correct option is B.
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As liquid water is evaporated into the atmosphere, heat energy is:
A. released by the evaporating water.
B. absorbed by the evaporating water.
C. absorbed by the surrounding air.
D. given off by the water vapor.
E. absorbed by the remaining liquid.
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: 162) What general term denotes a buried, erosional surface where rock layers are missing?
The general term that denotes a buried, erosional surface where rock layers are missing is called an "unconformity."
An unconformity is a buried erosional or non-depositional surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger layer, but the term is used to describe any break in the sedimentary geologic record. The significance of angular unconformity (see below) was shown by James Hutton, who found examples of Hutton's Unconformity at Jedburgh in 1787 and at Siccar Point in Berwickshire in 1788, both in Scotland. The rocks above an unconformity are younger than the rocks beneath (unless the sequence has been overturned). An unconformity represents time during which no sediments were preserved in a region or were subsequently eroded before the next deposition.
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as one moves south through ecuador and peru precipitation generally (assume altitude and slope remain constant)
As one moves south through Ecuador and Peru precipitation generally (assume altitude and slope remain constant) decrease.
The El Niño phase generates both decreased oceanic upwelling, which leads to major extinction events among marine and near-coastal animals, and excessive rainfall over the north coast of Peru and the southern coast of Ecuador.
In Northern Peru and Ecuador, the amount of rain falls dramatically, which causes erosion and coastal flooding. Homes, schools, hospitals, and commercial buildings may be destroyed by rain and flooding. Transport is restricted, and crops are destroyed. Droughts affect Australia and Indonesia at the same time when El Nio provides rain to South America.
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The complete question is:
As one moves south through ecuador and peru precipitation generally (assume altitude and slope remain constant) _____.
A lack of precipitation over a long period of time that results in water shortages
A lack of precipitation over a long period of time that results in water shortages is called drought.
Droughts can occur anywhere and can be brought on by a number of things, including climatic variability, changes in weather patterns, and human activities like excessive water use and changes in land use.
On the environment, economy, and society, droughts can have adverse affects. They can result in crop failures, a decrease in the amount of water available for irrigation and drinking, and an increase in the risk of wildfires. Droughts may also have societal consequences, including increased competition for water supplies, community uprooting, and higher food costs.
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True or False: As an air parcel expands, it does work on the environment
Numerical age dates based in radioactivity are very important for studying Precambrian geologic history because fossils are rare or absent.A. TrueB. False
A. True Numerical age dates based on radioactivity are very important for studying Precambrian geologic history because fossils are rare or absent. This method helps scientists to determine the age of rocks and understand the development of Earth's early history.
The Precambrian is a geologic eon that spans from the formation of the Earth about 4.6 billion years ago until the beginning of the Phanerozoic eon, which started about 541 million years ago. It is the longest eon in Earth's history, lasting for over 4 billion years, and it is divided into several different time periods. The Precambrian was marked by significant geological events, such as the formation of the Earth's crust and the evolution of life on Earth, including the development of photosynthesis and the emergence of eukaryotic cells. The Precambrian is also characterized by the formation of the first continents and the development of complex mineral deposits.
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a picture of the Gobi desert?
according to anthropologist laura ogden, the major environmental problem in the everglades is rising ocean levels. true or false
False. According to Laura Ogden, an anthropologist who has studied the Everglades, the major environmental problem in the Everglades is not rising ocean levels, but rather the loss and degradation of freshwater habitats.
The Everglades is a unique wetland ecosystem in southern Florida that is home to a diverse array of plant and animal species, many of which are threatened or endangered.Historically, the Everglades was fed by a slow-moving sheet of freshwater that flowed south from Lake Okeechobee through the River of Grass, a shallow, slow-moving river that spanned the width of the Everglades. However, decades of human intervention, including water diversion and land development, have significantly altered the natural flow of water in the Everglades, causing widespread habitat loss and degradation.While rising ocean levels are a concern for low-lying areas in southern Florida, including the Everglades, they are not the primary environmental problem facing the region.
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True or False: The atmospheric temperature will always be less than or equal to the dew point
The given statement "The atmospheric temperature will always be less than or equal to the dew point" is true because since the dew point represents the temperature at which the air is saturated with water vapor, the atmospheric temperature must always be less than or equal to the dew point.
The temperature at which the air becomes saturated with water vapour and condensation forms is known as the dew point. When the temperature of the atmosphere equals the dew point, the air is said to be at 100% relative humidity.
When the temperature of the atmosphere falls below the dew point, the air can no longer hold all of the water vapour it contains, and some of it condenses into liquid water or ice.
This is why, on cool nights when the temperature falls below the dew point, dew or frost frequently accumulates on surfaces.
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: 1 70) An unconformity in which the strata on either side are essentially parallel is termed a(n) ________.
An unconformity in which the strata on either side are essentially parallel is termed a disconformity.
In a disconformity, there is a break in the sedimentary record, where a layer of sedimentary rock was deposited on an eroded surface of an older layer of sedimentary rock.
However, the layers on either side of the unconformity are parallel to one another, indicating that there was no significant deformation or tilting of the rock layers during the unconformity-forming event. In contrast, an angular unconformity is characterized by tilted or folded rock layers on one side of the unconformity, and flat-lying rock layers on the other side.
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An unconformity in which the strata on either side are essentially parallel is termed a disconformity.
A disconformity is a type of unconformity that occurs between two parallel layers of sedimentary rocks of different ages. It represents a period of erosion or non-deposition, during which time the older rock layer was exposed to the surface and eroded while the younger layer continued to accumulate on top of it. Disconformities can be difficult to recognize because the layers above and below the unconformity appear to be parallel, making it hard to identify the gap in time represented by the missing layer. However, geologists can use a variety of techniques, including radiometric dating and fossil analysis, to determine the relative ages of the rocks and the time gap represented by the disconformity.
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The global leader in nuclear energy consumption is
a) France
b) Russia
c) United States
d) Canada
e) China
The 2010 age-structure pyramid for Niger indicates that the population of Niger ________.
The Niger population pyramid from 2010 shows that the country's population was rising.
The age distribution in the US is shown in this statistic from 2011 to 2021. In 2021, there were approximately 16.68 percent of Americans over the age of 65, 18.24 percent of Americans aged 0 to 14 years, 65.08 percent of Americans aged 15 to 64, and about 18.24 percent of Americans aged 0 to 14.
The ratio of individuals in each age group within a population during a specified period of time is referred to as the age structure of that population. It is an innate quality of a population in a nation or a territory. The birth rate, mortality rate, and migration of a population are all intimately correlated with the age structure.
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how can drought be triggred by physical condition
Answer: When rainfall is less than normal for a period of weeks to years, streamflows decline, water levels in lakes and reservoirs fall, and the depth to water in wells increases. If dry weather persists and water-supply problems develop, the dry period can become a drought.
What would happen to the oceans if surface runoff and groundwater flow were reduced (for example, by the growth of ice sheets during an ice age)?
-The oceans would become bigger.
-The oceans would stay the same size.
-The oceans would become smaller.
If surface runoff and groundwater flow were reduced due to the growth of ice sheets during an ice age, C. the oceans would become smaller.
This reduction would result from the increased accumulation of water in the form of ice, leading to a decline in the amount of water available to replenish the oceans. Additionally, the expansion of ice sheets would trap more water on land, further decreasing the volume of water reaching the oceans.
With less surface runoff and groundwater flow, the overall global water cycle would be affected. The reduced input of freshwater into the oceans would likely lead to changes in ocean currents, salinity, and the marine ecosystem. Ocean currents, which play a vital role in distributing heat and nutrients across the planet, could become disrupted, leading to further climatic changes and potentially impacting the global climate system. Moreover, the decrease in the volume of the oceans would result in lower sea levels, which could affect coastal ecosystems and the distribution of landmasses.
In summary, a reduction in surface runoff and groundwater flow due to the growth of ice sheets during an ice age would lead to smaller oceans, influencing various aspects of the global environment, such as ocean currents, sea levels, and marine ecosystems. Therefore, the correct option is C.
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What would happen to the oceans if surface runoff and groundwater flow were reduced (for example, by the growth of ice sheets during an ice age)?
A. The oceans would become bigger.
B. The oceans would stay the same size.
C. The oceans would become smaller.
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Not all employees at INTERPOL are law enforcement officials. Why is it important to have people from many different backgrounds and expertise working for INTERPOL?
CRIMINAL JUSTICE 20 POINTS
It is important to have people from many different backgrounds and expertise working for INTERPOL because it helps organization to effectively address range of global issues related to crime and security.
What is an organization?An organization refers to a group of individuals or entities that work together to achieve a common goal or objective. It could be a company, government agency, non-profit organization, or any other entity with a defined purpose. Organizations have a hierarchical structure, with each member of the group having a specific role or responsibility to contribute towards the achievement of the group's objectives. Communication, coordination, and collaboration are essential for the success of an organization. Effective management of resources, such as finances and personnel, is also crucial for the smooth functioning of an organization. Organizational culture, values, and goals play a significant role in shaping the behavior of the members of the organization and determine its overall success.
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Which chain of volcanic islands are far removed from a plate boundary?
a) Philippines
b) Iceland
c) Indonesia
d) Japan
e) Hawaii
The volcanic islands far removed from a plate boundary are e) Hawaii.
Hawaii is a chain of volcanic islands in the middle of the Pacific Ocean, around 2,000 miles away from the nearest plate boundary. Unlike the other options listed, Hawaii is not located at a convergent or divergent boundary between tectonic plates, but rather is a result of a hotspot, a plume of magma rising from deep within the Earth's mantle.
As the Pacific Plate moves over the hotspot, a chain of volcanoes is created, with the youngest and most active being the island of Hawaii, also known as the Big Island.
This unique geological feature makes Hawaii a popular destination for scientists and tourists alike, as it provides a rare opportunity to study and witness the formation of new land. So e is correct option.
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the second phase of the great ordovician mass extinction is associated with the disappearance of many fossil groups called_____
The second phase of the Great Ordovician Mass Extinction is associated with the disappearance of many fossil groups called "graptolites."
Graptolites were colonial animals that lived in the oceans and had a distinctive shape that made them easy to recognize in the fossil record. They were very common during the Ordovician Period, but their diversity declined sharply during the second phase of the mass extinction, which occurred around 445 million years ago. Other marine organisms that were affected during this phase of the extinction include trilobites, brachiopods, bryozoans, and conodonts, among others. The exact causes of the Great Ordovician Mass Extinction are still debated among scientists, but it is believed to have been caused by a combination of factors, including climate change, oceanic anoxia, and/or a meteorite impact.
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America's possessions in the Caribbean, _____ are not considered part of North America, and therefore will not be covered in this course.
America's possessions in the Caribbean, which are not considered part of North America and will not be covered in this course.
America's possessions in the Caribbean include territories like Puerto Rico, the U.S. Vir gin Islands, and other smaller islands. These territories are not considered part of North America due to their geographical location, as they are situated in the Caribbean Sea, southeast of the North American continent.
North America mainly comprises the countries of Canada, the United States, and Mexico, along with Greenland and a few smaller territories.
In this course, the focus will be on the regions and countries that are geographically and politically associated with the continent of North America, so the Caribbean possessions will not be covered. This allows for a more focused study of the specific continent and its related issues and topics.
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21) A very important way to increase the settling rate of fine particles in the open ocean is via ________.
A) fecal pellets
B) wind
C) precipitation
D) carbonate dissolution E) deposit feeders
A very important way to increase the settling rate of fine particles in the open ocean is via fecal pellets. Option A is the correct answer.
Copepods produce fecal pellets, which are a major source of sedimented material for benthic organisms and have a big impact on the vertical flux of biogenic elements, carbon sequestration in the deep ocean, and nutrient cycling. All of these things significantly contribute to the "biological carbon pump." Option A is the correct answer.
A frequent component of the ocean particle flow and a substantial supply of nutrients for deep water habitats are zooplankton feces pellets. Fecal pellets, produced by copepods, are a vital source of sedimented material for benthic organisms and have a significant influence on the vertical flow of biogenic substances into the deep sea as well as nutrient cycling. Option A is the correct answer.
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