Scientists use relative and absolute dating methods to determine the age of rocks and fossils and to organize Earth's 4.6-billion-year-old history.
Relative dating involves placing rocks and fossils in chronological order based on their positions in layers of sedimentary rock. The principle of superposition, for example, states that in an undisturbed sequence of sedimentary rocks, the oldest layer is at the bottom and the youngest layer is at the top. Absolute dating involves using radioactive isotopes to determine the exact age of rocks and fossils. This is done by measuring the decay of isotopes over time. For example, carbon-14 dating is used to determine the age of organic materials up to 50,000 years old, while uranium-lead dating can be used to determine the age of rocks that are billions of years old. Using these dating methods, scientists have developed the geologic time scale, which is a timeline of Earth's history based on major events and changes in the rock record. The geologic time scale is divided into eons, eras, periods, and epochs, and is based on the fossil record and the physical and chemical changes in rocks and minerals over time.
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are halides phosphates sulfates and nitrates water pollutants?
Yes, the above statement is true. Halides phosphates, sulfates, and nitrates are water pollutants resulting in water pollution.
Water pollution is when bodies of water become contaminated, usually as a result of human movement, which negatively affects how they can be used. Bodies of water include aquifers, reservoirs that hold water lakes, rivers, oceans, and groundwater. Contamination happens when contaminants enter these bodies of water.
Pollutants include things like chemicals, trash, bacteria, and parasites. All forms of pollution eventually taint water. The process of eutrophication, also referred to as the proliferation of large aquatic plants and algae, can be triggered by an overabundance of phosphorus. Algal blooms brought on by high phosphorus levels have the potential to produce poisons harmful to both human and animal health.
Sulfates also contribute to the acidity of soil and surface water, as well as to acid rain and fog, which harm ecosystems, forests, and plant life. Sulfates reflect sunlight into space because of their light color.
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4. The speech above was given to promote which
of Stalin's policies?
1. The Great Purge
2. Stalinization
3.
Collectivization
4. The Five-Year Plan
Answer:
I think 4. First Five-Year Plan
Explanation:
if it helped you please mark me a brainliest :))
What was Stalin's first policy?
In the Soviet Union the first Five-Year Plan (1928–32), implemented by Joseph Stalin, concentrated on developing heavy industry and collectivizing agriculture, at the cost of a drastic fall in consumer goods. The second Five-Year Plan (1933–37) continued the objectives of the first.
rock produced by solidification of molten material, either lava or magma.
The rock produced by the solidification of molten material, either lava or magma, is called "igneous rock". Igneous rocks are formed when magma or lava cools
Igneous rocks are one of the three main types of rocks, and are formed when molten material, either magma or lava, solidifies. These rocks are made up of a variety of minerals, and the cooling process determines their physical properties.
Depending on how quickly the molten material cools, the texture of the igneous rock can range from fine-grained to coarse-grained. Igneous rocks can be further classified based on the silica content, with the most common classifications being felsic, intermediate, mafic, and ultramafic.
-------------The given question is incomplete, the complete question is:
"Rock produced by solidification of molten material, either lava or magma is called?"--------------
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suppose that greenland's ice sheet was to melt completely. what effect would that have on sea level?
For example, if the Greenland ice sheet were to completely melt and the meltwater were to completely flow into the ocean, then global sea level would rise by about seven meters (23 feet) and Earth would rotate more slowly, with the length of the day becoming longer than it is today, by about 2 milliseconds.
Describe what forms the boundaries of the Ruamahunga river catchment to the East and west
The Tararua Range, a rough and forested mountain range that runs parallel to the east coast of the North Island, is the eastern boundary of the Ruamahunga River watershed. The Tararua Range, which has high peaks, slender ridges, and steep valleys, is a significant water supply for the catchment of the Ruamahunga River.
The Remutaka Range, a different mountain range that runs parallel to the east coast of the North Island, forms the western boundary of the Ruamahunga River watershed. There are numerous significant rivers and streams that run into the Tasman Sea in the Remutaka Range, which is particularly distinguished by its steep slopes and condensed ridges.
Overall, the southern North Island of New Zealand's Ruamahunga River watershed is a significant ecological and cultural landscape, and the natural boundaries that define its borders are crucial in determining the nature and dynamics of the catchment's hydrology and ecology.
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How is the Australian government managing resources to protect the Great Barrier Reef?
Responses
a. It prevents diving in the region.
b. It prevents commercial fishing in the region.
c. It prevents tourism in the region.
d. It prevents petroleum drilling in the region.
Answer:
it prevents petroleum drilling in the region.
Explanation:
describe 2 ways in which the environment influences the way people live
Answer: There are various ways and weather elements such as precipitation, sunlight, water etc, biotic factors, and all them sum up altogether and they affect our lives The various environmental factors include weather elements (such as temperature, precipitation, sunlight, etc.), resources (such as water, air, land, etc.) and biotic factors (other organisms, plants, etc.). A sum total of all these factors and how they interact with human beings affect how we live our lives. A region with heavier rainfall means that people will have to build homes and city with adequate drainage. A region with better water availability and more fertile land would be used for agriculture, while a drier region will have a different life style and work preferences. A region with more sunlight will mean people have to use shades and protect the cattle and themselves from heat (by drinking more water). Similarly, people living near oceans tend to eat more fish, while people living in plains (and near fertile regions), eat more vegetables, etc.
What type of sediment particles have worn surfaces and rounded corners? a. sorted c. clastic b. unsorted d. dissolved
The type of sediment particles that have worn surfaces and rounded corners are typically clastic sediment particles.
Clastic sediment particles are made up of pre-existing rock fragments that have been eroded and transported by wind, water, or ice. During transportation, these particles collide with each other and with other objects, causing them to break and wear down, resulting in their characteristic rounded shape and smooth surfaces. Sorted and unsorted sediment particles can both be clastic, but sorting refers to the degree of uniformity in the size of the particles, rather than their shape. Dissolved particles, on the other hand, are usually ions that are dissolved in water and do not have a physical shape.
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the picture above shows ocean in the upper right, a beach, and land in the lower left. the red dashes trace the crest of a wave. waves move perpendicular to their crests. what principle might be illustrated by the picture?
Answer:
The picture illustrates the principle of wave motion, specifically the fact that waves move perpendicular to their crests. The red dashes trace the crest of a wave, and the orientation of the beach, ocean, and land help to illustrate the direction of the wave's motion.
Explanation:
What happens after a helium flash?
A) The core quickly heats up and expands.
B) The star breaks apart in a violent explosion.
C) The core suddenly contracts.
D) The core stops fusing helium.
E) The star starts to fuse helium in a shell outside the core.
The right answer is option E) After a helium flash, the star's core suddenly contracts and heats up, causing the outer layers to expand. Helium fusion begins in a shell outside the core, leading to further evolution of the star.
A low-mass star begins combining helium in its centre when its core hydrogen is exhausted. The centre temperature increases and the star's exterior layers enlarge as helium fusion starts. Helium flashes, on the other hand, happen when the core hits a crucial temperature.
The centre abruptly shrinks and heats up during a helium flash, causing the exterior layers to enlarge even more. Helium fusion begins in a shell outside the centre after the explosion because the interior temperature is too low to support fusion. The star then moves into a new stage of its development, with the centre gradually contracting and heating up while the shell starts to consume helium.
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Which countries border the atlantic ocean and also the pacific oceans?
The countries that border the Atlantic ocean and also the Pacific oceans are Chile, Mexico, Colombia, Guatemala etc.
What countries border both the Atlantic and Pacific?The Pacific and Atlantic Oceans are the world's two largest oceans, covering a combined area of approximately 104,900,000 square miles. Many countries have coastlines on one of these oceans, but a few have coastlines on both.
Oceanographers consider the marginal seas, gulfs, and straits when determining whether a country borders both oceans. Chile, Mexico, and Guatemala are examples of countries that border both the Atlantic and Pacific oceans.
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Mention four poor conditions the people faced in the towns
Answer:
PollutionCrimeTrafficExplanation:
The humid subtropical climate dominates the ______ United States. A) central B) southeastern C) western D) northeastern E) southwestern.
The humid subtropical climate dominates the southeastern United States.
What is a humid subtropical climate?Humid subtropical climate is a type of climate that is characterized by hot and humid summers and mild to cool winters. This climate is found on the eastern side of the continents and is located between the latitudes of 20° and 35° north and south of the equator.
The humid subtropical climate is a type of climate found in the southeastern United States (option B).
Characteristics of the humid subtropical climate are:
Hot summers with high humidity, Mild to cool winters, Moderate rainfall throughout the year Distinct summer rainfall, Maximum rainfall during the summer months (June to September)Moderate risk of hurricanes due to location.
The humid subtropical climate is found on the eastern side of the continents and is located between the latitudes of 20° and 35° north and south of the equator. It is a type of climate found in the southeastern United States.
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Which are found in Antarctica?
Select all that apply.
Responses
a. Canterbury Plains
b. Mount Erebus
c. Nullarbor Plain
d. Ross Ice Shelf
e. Southern Alps
f. Transantarctic Mountains
Answer: My teacher makes us know the places I put in the explanation :)
Explanation:
F
D
B
PLEASE HELP ASAP!
The Cordilleran region has many _____ which were a serious barrier to communications and transportation between the Atlantic and Pacific sides of Canada.
A. lakes
B. deserts
C. rivers
D. mountains
Answer:
The correct answer is D. mountains
Mountains are the ideal solution in this case which is a barrier.
How do mountains present a significant barrier for Canada's Atlantic and Pacific coasts?The Pacific Mountain System is a group of mountain ranges that stretches from northwest Mexico to northern British Columbia along the Pacific Ocean coast of North America. They cross into Canada from the north and extend across the United States for about 4,500 miles (7,250 km).
Eight sections can be made from the ranges. roughly speaking, south to north.
The Pacific mountain system was created as a result of the movement of tectonic plates.
This movement has folded, faulted, and intruded with molten rock the coastal mountains from the Queen Charlotte Islands southward to southern California.
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what would adherents check to find out what to celebrate holy days in the catholic religion
Adherents of the Catholic religion would typically consult the liturgical calendar to determine which holy days to celebrate.
Adherents of the Catholic religion would typically consult the liturgical calendar to determine which holy days to celebrate. The liturgical calendar is a schedule of celebrations, including feasts and memorials, that are observed by the Catholic Church throughout the year. It is divided into several seasons, such as Advent, Christmas, Lent, Easter, and Ordinary Time, each with its own set of observances. The calendar is an important tool for Catholics to ensure that they are participating in the appropriate rituals and ceremonies at the right times. Additionally, local dioceses and parishes may have their own particular celebrations and customs, which adherents may also consult.
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How do the physical features and
resources of Southwest Asia affect
its people and their influence in
the world?
Answer:
Explanation:
Access to water: The region's rivers, such as the Tigris and Euphrates, have allowed for the development of agriculture and civilization since ancient times. However, access to water has also been a source of conflict between neighboring countries, such as Turkey, Syria, and Iraq.
Oil reserves: Southwest Asia is home to some of the world's largest oil reserves, which has made it a major player in the global energy market. The oil industry has also contributed to the region's economic growth, but has also led to political instability and conflicts.
Strategic location: The region's location at the crossroads of Europe, Africa, and Asia has made it a center of trade and commerce throughout history. It has also made it a strategic location for military and political influence in the world, with countries such as Iran, Saudi Arabia, and Israel playing important roles in regional and global affairs.
Desertification: The region's arid and semi-arid climate has led to desertification, which has affected agriculture and the livelihoods of people living in rural areas. This has contributed to poverty and migration to urban centers.
In summary, the physical features and resources of Southwest Asia have shaped the region's history, economy, and political influence in the world. However, they have also been a source of conflict, environmental challenges, and social inequality.
which of the following are true of earthquakes related to mid-ocean ridges? multiple select question. most have hypocenters less than 20 km deep. all occur directly along the ridge itself. many occur along the axis of the ridge due to normal faulting or magma intrusions. they may occur along steep faults away from the ridge axis as the new crust cools and bends. they may be due to strike-slip motion along transform faults. most are deep faults due to movement of magma.
Earthquakes related to mid-ocean ridges have hypocenters less than 20 km deep, may occur along the axis of the ridge due to normal faulting or magma intrusions, may occur along steep faults away from the ridge axis as the new crust cools and bends, and may be due to strike-slip motion along transform faults.
Earthquakes related to mid-ocean ridges are generally caused by faults, magma intrusions, and movements, leading to tremors, shaking, and other related activities. Earthquakes related to mid-ocean ridges can occur due to a variety of reasons, including normal faulting and magma intrusions, along with steep faults away from the ridge axis. Moreover, some of the earthquakes can be due to the strike-slip motion along the transform faults that are present in the area. Most of these earthquakes have hypocenters less than 20 km deep, and they are not always along the ridge itself.
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What is one method of IPM that is used to control pests?
One method of Integrated Pest Management (IPM) that is used to control pests is biological control. This involves using natural predators, parasites, and diseases to reduce the population of harmful pests.
Integrated Pest Management (IPM) is a sustainable approach to managing pest problems that aims to minimize the negative impact of pests on the environment, human health, and economic resources.
IPM involves a combination of techniques and strategies that are designed to prevent and manage pest infestations. These include:
Cultural control measures: This involves modifying the environment or cultural practices to make it less conducive for pests. For example, rotating crops, planting pest-resistant varieties, and maintaining proper sanitation practices.Biological control measures: This involves the use of natural predators, parasites, or pathogens to control pest populations.Physical and mechanical control measures: This involves the use of physical barriers, traps, or other mechanical methods to control pests.Chemical control measures: This involves the use of pesticides, but only as a last resort and in a targeted and judicious manner.Learn more about Integrated Pest Management (IPM): brainly.com/question/13492715
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The motion of Earth’s molten rock shows characteristic patterns which can be analyzed and explained scientifically. Such analysis and explanation is impossible without understanding the principles of which kind of energy?
- Chemical
- Electrical
- Thermal
- Radiant
The motion of Earth’s molten rock shows characteristic patterns which can be analyzed and explained scientifically. Such analysis and explanation is impossible without understanding the principles of Thermal energy. The correct option is C.
The motion of Earth's molten rock is mainly driven by thermal energy. Thermal energy is energy that is generated by the heat created from reactions and conversions of other forms of energy such as chemical energy and electrical energy. In the Earth's core, the heat energy is created by the decay of radioactive elements and the gravitational energy of the Earth's mass.
This energy is transferred to the surrounding molten rock in the form of heat, causing it to flow and circulate throughout the Earth's interior. This flow of molten rock is what creates the characteristic patterns that can be analyzed and explained scientifically. Understanding the principles of thermal energy is essential in order to accurately analyze and explain the motion of Earth's molten rock. The correct option is C.
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safety measures when handling a spade, Agriculture
Answer:
Do not shovel after eating or while smoking.Take it slow and stretch out before you begin.Shovel only fresh, powdery snow; it's lighter.Push the snow rather than lifting it.If you do lift it, use a small shovel or only partially fill the shovel.Explanation:
Where is the caldera volcano located?
which of the following are potential sources of destruction that may be caused either directly or secondarily by earthquakes? multiple select question. aftershocks fires typhoons tsunamis landslides and rock falls lightning strikes
The potential sources of destruction that may be caused either directly or secondarily by earthquakes are: aftershocks, fires, tsunamis, landslides, and rock falls. Therefore, the correct option is A, B, D, E.
Explanation:
An earthquake is a tremor or shaking that takes place on the Earth's surface. Earthquakes occur when the Earth's crust is subjected to sudden pressure or tension. Earthquakes are caused by a variety of factors, including tectonic plate movement, volcanic activity, and human activity.
The impact of earthquakes can range from minor to catastrophic, depending on the magnitude of the earthquake and the location of the epicenter.
Aftershocks: After the main earthquake, a series of smaller earthquakes occur. These smaller earthquakes are known as aftershocks, and they can cause additional harm to structures that were previously damaged by the primary earthquake.
Fires: Earthquakes can also trigger fires. Broken gas lines and electrical lines may cause fires. Earthquakes can cause structures to collapse, trapping people inside and making it difficult for emergency services to reach them.
Tsunamis: Tsunamis are large ocean waves caused by underwater earthquakes, landslides, or volcanic eruptions. They are particularly dangerous because they can travel hundreds of kilometers and hit coastlines with little warning.
Landslides and rock falls: Earthquakes can cause landslides and rock falls. These events can cause additional harm to buildings and infrastructure.
Lightning strikes: Earthquakes do not cause lightning strikes, so this option is not correct.
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The deep-sea floor is characterized by sediment dominated by: A. fine dust and the remains of single-celled organisms. B. silt and sand derived from rivers and streams. C. calcite mud and other material derived from coral reefs.
The deep-sea floor is characterized by sediment dominated by fine dust and the remains of single-celled organisms. Hence, option A is correct.
The comparatively level deep sea floor is known as the abyssal plain. Between 3,000 and 6,000 meters below the sea's surface, there is a cold, gloomy region. Squat lobsters, red shrimp, and several sea cucumber species also call it home. Most of the time, these species have trouble finding food.
Terrigenous, pelagic, and hydrogenous sediment are the three different types of seafloor sediment. Terrible sediment is deposited on the continental shelf, continental rise, and abyssal plain and is derived from the land. Along the continental uplift, strong currents further shape it.
Calcium carbonate precipitates and the remains of shelled marine organisms combine to make limestone at the ocean's bottom. If limestone is discovered on land, likely, the region was once submerged.
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Which could happen if the Great Barrier Reef is destroyed?
Responses
a. Australian oceans will lose protection from climate change.
b. Australian oceans will become more acidic.
c. Australian coastlines will be exposed to hurricanes and tsunamis.
d. Australian coastlines will become more polluted.
If the the Great Barrier Reef is destroyed then Australian oceans will lose protection from climate change and become more acidic which will result in corrosion of coastline.
Hence the correct answer is option a. and b.
Why is the Great Barrier Reef unique?The Great Barrier Reef is exceptional in that it stretches across 14 degrees of latitude, from shallow estuary regions to deep oceanic seas. A diverse array of biological groups, habitats, and species may be found within this large area, making the Reef one of the planet's most complex natural ecosystems.
Who is the Great Barrier Reef's owner?Aboriginal and Torres Strait Islander peoples are the area's Traditional Owners and have an enduring connection to their land and sea home.
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mars does not have enough atmosphere to support liquid water, yet mars has gigantic dry river beds. what must have been true on mars in the past?
The presence of large dry river beds on Mars suggests that there was once flowing liquid water on the planet. This is because the formation of river beds requires the presence of liquid water, which can carve out channels in the surface over time.
However, today Mars does not have enough atmosphere to support liquid water on its surface, as the low atmospheric pressure causes any water to quickly evaporate or freeze. Therefore, it is believed that Mars must have had a thicker atmosphere and warmer climate in the past that allowed liquid water to exist on the surface. This could have been due to a number of factors, such as volcanic activity or changes in the planet's orbit or axial tilt. As Mars' atmosphere was lost over time, the planet became colder and drier, leaving behind the dry river beds that we observe today.
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Classical Greece and Rome have contributed greatly to our current understanding of
democracy. In ancient Greece, citizens were directly responsible for participating in
government decisions. In Rome, the citizens elected government officials to make
decisions on their behalf as part of a republican government. Both systems of
democracy direct and representativehave influenced the US political system.
After learning about the history of ancient Greece and Rome, what do you think are the
benefits of a democratic system? In what ways did democracy serve Greece and
Rome? Has there been a time when democracy didn't serve Greece or Rome in a way
that was beneficial? What circumstances contributed to the failures of democracy you
learned about in the lessons on ancient Greece and ancient Rome? Are there any
potentially negative aspects of democracy? Why or why not?
Greece and Rome came to the conclusion that citizens should participate in politics through voting, participating in public debates, passing laws, and serving on juries.
What are democracy's connections to ancient Greece and Rome?One of the main legacies of the Athenian democracy was its impact on the Roman Republic, which lasted until 27 B.C. A representative democracy was developed by the Roman Republic by modifying the concept of direct democracy, which attracted the interest of Europeans and European colonists for numerous centuries.
What distinctions existed between Greek and Roman democracies?Rome was governed as a republic, unlike Athens. The term "Republic" denoted a populist administration. According to the definition of Athenian democracy, it was not a democratic system.
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which category of nations has the most land? a. most industrialized nations b. industrializing nations c. least industrialized nations d. most populous nations
The category of nations that has the most land is least industrialized nations.
What are nations?
A nation is a geographical and political entity that is larger than a state or community. A country is a geographical and political unit, as opposed to a city-state or an empire, and it is most often referred to as a sovereign state.
It has borders that are defined and acknowledged by the rest of the world, as well as a government and a standing army.
The category of nations that has the most land is least industrialized nations.
Less developed nations are typically characterized by economic underdevelopment and a relatively low standard of living. Because of their natural resources, these countries are frequently agricultural, but they may also have some manufacturing capabilities. They are nations that are not yet fully industrialized.
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where was the largest volcanic explosion ever recorded by humans?
On the Indonesian island of Sumbawa, Mount Tambora, a volcano, erupted in 1815 with the biggest volcanic explosion ever seen by humans.
Explanation: The Mount Tambora eruption in 1815 was a devastating occurrence that affected the climate globally and claimed the lives of an estimated 71,000 people. Massive volumes of ash, gases, and debris were released into the atmosphere during the eruption of the volcano, which had an eruption force 100 times greater than Mount St. Helens' explosion in 1980. Due to the eruption's extreme intensity, global temperatures were reduced by up to 3 degrees Celsius, which caused severe crop failures and hunger in many regions of the world.
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What type of weathering has a greater impact in colder climates? How about in warmer climates?
When it comes to weathering, the type that has a greater impact in colder climates is mechanical weathering.
In warmer climates, on the other hand, chemical weathering has a greater impact.What is weathering? Weathering is the disintegration and decomposition of rock surfaces. It is caused by environmental factors such as rain, wind, and temperature changes. Mechanical and chemical weathering are the two types of weathering that are commonly discussed. What is mechanical weathering? The physical breakdown of rocks is referred to as mechanical weathering. This type of weathering is caused by physical processes such as temperature changes and the expansion and contraction of rock due to freezing and thawing. It is most prevalent in cold, arid environments.What is chemical weathering?The chemical alteration of rock surfaces is known as chemical weathering.
This type of weathering is caused by chemical reactions between rocks and the environment, such as the atmosphere, water, or other substances. It is most prevalent in warm, wet environments.What type of weathering has a greater impact in colder climates?The type of weathering that has a greater impact in colder climates is mechanical weathering. This is because colder climates are characterized by low temperatures, which can cause rocks to contract and expand, causing them to break apart over time.
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