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Observe the given map below and answer the following questions:

1. Considering the isotherms of Brazil, what is the average range of temperature in Brazil?

2. In which area does it rain more?

3. From which directions are winds blowing towards Brazil?

4. What could be the reason behind that?

5. What could be the obstruction in the way of these winds?

6. Which type of rainfall will occur because of these winds?

7. Correlate these winds and rainfall.

1 Answer

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1. Considering the isotherms of Brazil, the average range of temperature of Brazil is 10°C (28°C-18°C).

2. It rains more in the northern and central part of Brazil. E.g., Amazon Valley.

3. The winds are blowing from North East and South East directions.

4. These are permanent trade winds which blow from high pressure belt to the equatorial low pressure belt. Brazil being in the tropical zone, a low pressure area is created and wind start blowing from the ocean to the land.

5. The Escarpment acts as obstruction in the way of the South East Trade Winds coming from the sea.

6. Orographic rainfall will occur because of these winds.

7. The escarpments act as an obstruction to the winds blowing from the sea and cause an orographic type of rainfall in the coastal region. Beyond the Highlands, the effect of these winds gets reduced. As a result, the rainfall is minimal.

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