How has agriculture developed in Africa since the 1800’s? Add source as well please thank you.

Answer: There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements.

What is the definition of exothermic reaction?

In thermochemistry, an exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat.

Which reactions are exothermic?

The exothermic reaction is the opposite of an endothermic reaction. It releases energy by light or heat to its surrounding. A few examples are neutralisation, burning a substance, reactions of fuels, deposition of dry ice, respiration, solution of sulphuric acid into water and much more.

The countries(land areas) through which the equator passes are :

1. Ecuador

2. Columbia

3. Brazil

4. Sao Tome & Principe

5. Gabon

7. The Republic of Congo

8. The Democratic Republic of the Congo

9. Uganda

10. Kenya

11. Somalia

12. The Maldives

13. Indonesia

14. Kiribati

The water (water areas) bodies through which the equator passes are :

1. The Atlantic Ocean

2. The Pacific Ocean

3. The Indian Ocean

The equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the north pole and the south pole. At 0 degrees latitude, an equator divides the planet into a northern hemisphere and a southern hemisphere.

Learn more about another circle that separates the planet into the eastern and western hemispheres.

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One of the highest-paid Latina actors in Hollywood history is Jennifer Lopez. With a number of pop records, she also achieved crossover success in the music industry.

Interesting Jessica Lopez Facts: To appease her parents, Jennifer Lopez temporarily attended college. Jennifer left her parents' house after they refused to support her aspirations to become famous. Jennifer Lopez joined New Kids on the Block in 1991 as a backup dancer.

In the media, Jennifer Lopez virilized Latino ancestry and culture. Young Latina and Hispanic women who found it difficult to identify with other actors and performers grew to view her as an icon. She popularized The Bronx and Puerto Rico with her songs and her character.

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Answer:

There is less green/natural space on this planet, and it is being replaced by urban infrastructture. Also could mean that the world is overcrowded and the population is increasing too fast.

Explanation:

The scientific consensus is that human activities are responsible for the recent increase in global temperatures because they are strengthening the  greenhouse effect.

There is broad scientific agreement that human activities are mostly to blame for the increase in global temperatures. Many scientific organisations' position statements and assessments of experts' opinions, many of which expressly concur with the Intergovernmental Panel on Climate Change (IPCC) synthesis reports, reinforce this consensus.

The increased greenhouse effect describes the heat brought on by increases in greenhouse gases caused by human activities. Since the beginning of the industrial era, the atmospheric concentration of carbon dioxide has grown by more than 30%, and it is presently the highest it has been in at least the last 650,000 years.

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Both developed and developing countries are experiencing an increase in urbanization.

The proportion of the world's urban population is expected to rise from 47% in 2000 to around 57% by 2050. Large cities in developing countries will account for more than 90% of future population growth.

Africa has experienced the fastest urban growth in the developing world over the last two decades, at 3.5% per year, and this rate of growth is expected to continue into 2050.

According to projections, some African cities will account for up to 85% of the population between 2010 and 2025.

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Answer:

Isosceles right triangle

Explanation:

Determine the shape: isosceles right triangle

Answer: isosceles right triangle

thats all i can help with im afraid

In an effort to understand the diffusion of language, the Sedentary Farmer Theory was given by British archaeologist Colin Renfrew in 1987.

The Proto-Indo-European dispersion started in Neolithic Anatolia, according to the Anatolian hypothesis, also known as the Anatolian theory or the sedentary farmer idea, which British archaeologist Colin Renfrew initially put out in 1987.

It is the principal rival of the Kurgan hypothesis, sometimes known as the steppe idea, which is more well-liked among academics. According to the theory, Indo-European languages started to diffuse peacefully throughout Europe from Asia Minor at approximately 7000 BC as farming technology advanced during the Neolithic period (wave of advance).

As a result, Indo-European languages would have been spoken by the majority of Neolithic Europeans, and later migrations would have replaced these languages with other Indo-European languages.

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Rain that falls on central Pennsylvania each year most of it is evaporated.

Life depends on water, and life is highly adept at utilising it. Trees consume practically all of the rain that falls when their leaves are out, and tree roots reach deep into the soil and draw up some of the water from cold-season rain and snowmelt.

Even though plants still receive the majority of water, a sizable portion of it does sink into the ground and run to streams (perhaps 1/3 of the total). Although much of the land is not paved and little water flows across natural surfaces to streams, the quantity of water that does flow across the surface is growing as we pave the terrain.

Direct rainfall into streams, lakes, and rivers is minimal because they make up such a small portion of the landscape. Although "frackers" need water mixed with additional chemicals for the recovery of natural gas, they do not use nearly as much water as trees do. Additionally, even if the precise chemical make-up of the frack waters is a trade secret, we are confident that it does not consist of soda!

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Which phrase tells how the Hawaiian culture was characterized for centuries before Europeans and Americans came to the Hawaiian Islands?

hunting and gathering for food, and religious sacrifice of animals

irrigated plantations and a system of strict religious taboos

importing food from Asia and written religious scriptures

small, primitive farms and ancestor worship

Complete question

The Hawaiian way of life turned into characterized for: irrigated plantations and a machine of strict non secular taboos

The required details for  Hawaiian way in given paragraph

Hawaiian way of life is primarily based totally round age-antique legends and superstitions, starting from conventional gods and goddesses like Maui (a demi-god who pulled up the island from the ocean bed), Pele (a depraved and misleading volcano goddess) and her sister Poliahu (a snow god). Hawaiian way of life might also additionally preserve among the solutions sought in a unexpectedly converting world. The spirit of aloha – being withinside the presence of and sharing the essence of life – teaches us classes of peace, kindness, compassion and obligation to destiny generations.

As the Native Hawaiians used their assets inside their ahupua'a, they practiced Na Waiwai, or precious values, and understood the deeper which means of the phrases aloha (respect), laulima (cooperation of many hands) and malama (stewardship) which ended in all and sundry dwelling pono, or doing proper through one another.

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I would need three as a minimum number of seismometers, in order to locate the earthquake.  

The P- and S-wave arrival times at various seismometers are utilized to pinpoint the earthquake's exact location. The separation of the P- and S-wave arrival times indicates how far away the earthquake is from the seismometer, providing we know the relative speeds of the P- and S-waves.

So, concludingly, in general, tracings are made at three different or separate seismic stations ( that record the ground moments and display them in digital form as digital data), which are needed to locate the earthquake center point.

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In comparison to a Mediterranean climate, the West Coast's marine climate has milder annual temperatures. Due to the significant impact of midlatitude cyclones, Marine West Coast climates experience higher annual precipitation totals than Mediterranean climates, which are also more evenly distributed throughout the year.

A temperate climate sub-type known as a Mediterranean climate, also known as a dry summer temperate climate Cs, is characterized by dry summers and mild, wet winters.

The Mediterranean Basin, where this climate type is most prevalent, gave rise to the name of the climate. Mediterranean climate zones are typically found between roughly 30 and 45 degrees north and south of the equator, along the western coasts of continents.

The subtropical ridge, which grows toward the hemisphere's pole during the summer and migrates toward the equator during the winter as a result of the seasonal poleward-equatorward temperature variations, is the primary contributor to the Mediterranean, or dry summer climate.

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Answer:

A.

forced population control

You will need a minimum of three seismometers in order to locate the earthquakes.

A seismometer is a tool used to measure ground vibrations caused by earthquakes, volcanic eruptions, and explosions. These, a timing device, and a recording device make up a seismograph in most cases. During an earthquake, seismic waves are launched into outer space.

The epicenter of an earthquake can be located using seismographs from at least three different places. Seismometers allow for earthquake detection and monitoring by converting seismic wave vibrations into electrical impulses that may then be visualized as seismograms on a computer screen. Seismologists study earthquakes and can use this knowledge to determine an earthquake's precise location and magnitude.

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The plates represents tectonic boundaries

1. Wooden blocks

Three symbols are wont to denote the borders between plates. Divergent plate boundaries are shown  by lines with gray shading, convergent plate boundaries by the "triangle" sign, and transform plate boundaries by one line with or without the "T" symbol.

2. Water

The majority of the interior of the Earth is consist of the mantle. The Earth's thin exterior layer,  called the crust, and it's deep, extremely hot core are separated by the mantle.

3. A hot plate heat:

The sun, the ground . A water  vapor (eg air source heat pumps). Water (for instance; water source heat pumps)

4. Thanks to the convection current :

An vacuum pump is attached to the vessel. The block of wood floats over when the vessel is crammed with more air (ignoring  the compressibility of the water)

5. Greater density near the underside and lower density near the surface:

A gallon of water will weight heavier and be denser as more and  more stuff is dissolved in it; ocean water is denser in comparison  pure water. during a glass of water, heavy ice cubes sink to the underside while regular cubes floats in it .

6. Thanks to the temperature disparities between the two types of water, warm water rises, and cold water sinks.

A process that takes  the transfer of energy from one location to a another  is a convection current. it's also called  as heat transfer by convection. The difference in temperature between the 2 fluid compound allows the heat energy to be transported by  the convection.

The Earth's lithosphere, which incorporates the crust and upper mantle, is split into many sorts  called plates that move slowly, consistent with the tectonic theory, which was considered  within the 1960s. It explains and illustrates how the big plates move along  with the various plate tectonic boundaries (convergent, divergent, and transform fault) where they collide, often  as the geological occurrences (earthquakes and subduction) and geologic features (formation of mountains, volcanoes, and trenches) that happen at such  boundaries of the plates .

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The spectrum a star absorbs can identify are in a distant star. Astronomers can identify an element by its spectral lines, as well as its temperature and density within the star.

The magnetic field of the star can also be shown via the spectral line. How quickly the material is travelling can be determined by the line's spectrum. Because stellar spectra resemble blackbodies, it is possible to determine a star's temperature incredibly precisely by taking brightness measurements using two separate filters. Astronomers attain a perfect temperature: Compare the ratio of red to blue light after measuring the brightness of a star with two filters.

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Answer:

y= 2x +4

Explanation:

To be parallel means the line second line will never cross as u keep moving along.  2 lines that never cross that have same direction.

So when you shift the y intercept( the y point on graph) the new line is on top of the old line. But the new line will never cross since the slope is same.

The correct answer is option D: minor undulations in the earth's orbital parameters.

Rossby waves are minor undulations in the earth's orbital parameters.

Rossby waves are giant undulating horizontal tidal movements of ocean waves that are produced as a result of the earth's rotation on its own axis.

These are also called planetary waves and occur naturally in rotating fluids.

American meteorologist, Carl-Gustaf Arvid Rossby first discovered them hence called the Rossby wave.

Moreover, when observed from the atmosphere it was seen that these waves extend horizontally in a westward direction and can travel up to 100s kilometers.

These waves are so massive and giant that they are capable of changing the climate of earth on a large scale.

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The identities of each unknown mineral are feldspar, quartz, and mica.

What is mineral?
A mineral or mineral species is, generally speaking, a solid chemical compound with a very well-defined chemical composition and a particular crystal structure that occurs naturally in pure form in geology and mineralogy. Compounds found only in living creatures are typically not considered minerals according to geological definitions. However, some minerals, like calcite, are frequently biogenic or, in the context of chemistry, are organic molecules (such as mellite). Additionally, living things frequently produce inorganic minerals (like hydroxylapatite), which are also found in rocks. Rock, which is defined as any bulk solid geologic substance that is sufficiently massive and sufficiently homogeneous, is not a mineral. A rock can be made of a single type of mineral or it can be an amalgam of two or more different mineral types that have been spatially separated into different phases.

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Answer:    rural peripheral part of the are, where most people worked the  land area.

Explanation:

Answer:

Different time zones (majority) and different climate.

Studies reveal that in countries such as Paraguay, around 30 percent of the population has access to the Internet. But people living in rural areas have little access to the Internet. This is an example of lack of basic infrastructure.

In countries such as Iran and China, people cannot freely access all websites. This is an example of Socio-political barriers.

Social barriers are settings in which individuals are born, develop, live, study, work, and age - also known as social determinants of health - that might lead to diminished functioning in persons with disabilities. Following are some instances of societal barriers: Disabled people are significantly less likely to be employed.

Some barriers are intentionally put in place by the government in communist states.

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The picture depicts the collision of two continents. Two continental tectonic plates collide when they come into contact with one another. One of the continental plates will slip beneath the other continental tectonic plates during a continental collision, while the other plate may shatter and be thrust upward.

The Himalayan Mountains are one of the best illustrations of a continental-continental collision zone. The collision of two continental tectonic plates is what created these tallest mountain chains. When two continental plates collided, one of them broke apart and was driven upward, creating the tallest mountain chain on Earth.

The picture depicts the collision of two continents. Two continental tectonic plates collide when they come into contact with one another. One of the continental plates will slip beneath the other continental tectonic plates during a continental collision, while the other plate may shatter and be thrust upward.

The collision of continents is depicted in this image.

Some of the biggest mountain ranges in the world are the result of continental collisions.

Two continents are fused together when enormous slabs of crust (or two continental plates) clash. There are many major earthquakes that happen there.

The Himalayas are the most well-known example of a continent-continent collision zone (India collided with Asia).

The complete question is:

Study this image. Which feature forms at this plate boundary? mountains rift valleys volcanoes island chains

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Globalization's rise in recent decades has increased income inequality in the U.S. while benefitting the executives, according to a study done by the National Bureau of Economic Research which directly connects globalized commerce with a prominent wage gap in the country.

The global trade dynamics encountered a huge shift during this time frame – particularly in the 1990s and 2000s, which saw the signing of the North American Free Trade Agreement (NAFTA) and China joining the World Trade Organization. Both events have been acknowledged by globalization critics, especially by President Donald Trump, as key turning points for the U.S. economy.

Although, Europe represents only about 8 percent of the Earth's landmass, from 1492 to 1914, Europeans colonized more than 80 percent of the entire world, which started with the gunpowder technology. Though it was invented in China and used in Japan and Southeast Asia, the Europeans excelled at using it, which catered to their successful conquests.

Gunpowder was very important for conquering territory as it allows a small number of people to impose a lot of influence. The technology grew to include more than just guns: armed ships, fortifications that can resist artillery, and many more, and the Europeans became the finest at using these things.

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The marine food sources will not be able to keep up with human growth population.

There isn't much space for hope. There doesn't seem to be enough water available for agriculture to produce enough food to feed the world's 9200 million inhabitants.

Already under water stress, the current population is made worse by the interaction between population expansion and climate change. Additionally, since the middle of the 1980s, worldwide fisheries landings have been dropping, which has added to the current crisis in food production.

The food-producing industry least dependent on the availability of freshwater, marine aquaculture (hereinafter mariculture), will be used to help feed humanity in the twenty-first century.

Although there is still room for growth in northern temperate regions, despite significant intensification (such as a 10-fold increase in the yield of Chinese freshwater aquaculture in 20 years), freshwater aquaculture is becoming increasingly spatially constrained in the tropics and subtropics due to rapid human population growth and the concomitant high requirements for direct use of water and land.

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Metamorphic rocks are the rocks that are formed through the solid-state alteration of a previously existing rock, by heating, pressure, and/or chemically active fluids.

The word "metamorphosis" literally means "shape transformation." Rocks undergo metamorphism, which is the structural, chemical, and mineralogical adaptation of solid rocks to the physical and chemical conditions imposed at depth below the surface.

Usually, metamorphism takes place below the surficial zones, where the processes of cementation, compaction, and sedimentation occur. When a rock is exposed to conditions that are different from those in which it developed, metamorphism may occur.

A rock that was once one type of rock but changed to another under the action of heat, pressure, or fluids without going through a liquid phase is referred to as metamorphic (without completely melting).

Every time rocks experience changes in heat, pressure, or exposure to chemically reactive fluids, they undergo metamorphic transformations. These fluids include a variety of gases and liquids that exist under pressure inside the Earth, mostly water and steam.

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