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Social sciences: geography

Grade 6

Population distribution and density on a global scale

Module 6

Rapid expansion problems

Rio de Janeiro : one city ─ two worlds

Note : One of the 22 federal states of Brazil is called Rio de Janeiro, but in this learning unit we are referring to the city of Rio de Janeiro, which was the capital city of Brazil until 1960. The harbour city of Rio de Janeiro, in Guanabara Bay, is the most important economic and financial centre of the country.

Activity 1:

To do research on rio de janeiro and consult a number of sources

[lo 1.2, 1.5]

1. What does the name mean?

2. How did the city get this name?

3. What language is spoken by the majority of residents?

4. Longitude and latitude of the city:

5. The climate of the city:

6. Population of the city:

1. Rapid growth causes serious problems.

  • In 1969 the population was 4 million – this grew to 12 million in the following 30 years! When the population grows so rapidly – anywhere in the world – problems occur.
  • Brazil is not a rich enough country to provide houses for everyone who moves from the countryside to the city. Because many of these new inhabitants have moved to the city in search of a better life, it is obvious that they do not have money to build conventional houses. Much more than a house is needed: water and electricity must also be supplied. Then there is a need for sewerage and transport. This situation is more serious in many other developing countries and cities, because employment opportunities do not increase as rapidly as the population. This makes large-scale informal housing unavoidable – also in Rio de Janeiro.
  • Because of inadequate public transport, the informal settlements have developed close to the city centre and industrial areas, as in other countries.
  • About a quarter of Rio de Janeiro’s residents live in informal settlements, called favelas . The favelas are characterised by bad planning (often no planning), unhealthy living conditions and crime. The contrast in living conditions between the rich and the poor is more obvious in this city than in other cities with an exceptionally rapid growth rate. In one part of the city wealthy people live in big houses on large pieces of land. 5% of the city’s residents live on 25% of the city’s land.

Why has the influx of people into Rio de Janeiro been so rapid?

During the last part of the previous century, migration of people took place from isolated rural areas to urban areas – it seemed that people found the facilities and the attractions of the cities irresistible. Many people were convinced that the opportunities that could ensure the future of their children could only be provided in the cities. In Brazil this tendency was further influenced by droughts and other problems in the agricultural sector in the country’s interior.

Food factories, manufacturers of textile fabrics, electronic equipment and pharmaceuticals, as well as oil refineries, provide employment opportunities in Rio de Janeiro.

The worldwide phenomenon of a rapidly developing tourist industry is also evident in Rio de Janeiro – the city’s beaches and the natural beauty of the environment attract people from all over the world. Unfortunately the growth in employment opportunities in tourism and industry is not as fast as the population growth. The results are predictable.

Questions & Answers

what does the ideal gas law states
Joy Reply
Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
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Source:  OpenStax, Geography grade 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col11000/1.1
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