Some of the major natural regions of the world are as follows:

1. Equatorial Region

2. Tropical Grassland (Savanna) Region

3. Tropical Deciduous Forest Region

4. Tropical Deserts

5. Mediterranean Region

6. East Margin Region (China Type)

7. Mid-Latitude Deserts (Steppe Lands)

8. Eastern Margins or St Lawrence type

9. Mid-latitude Grassland Region

10. Cool (Mid Latitude) West European Type

11. The Taiga (coniferous) Region

12. Polar Lowlands (Tundra)

13. Polar Highlands (Ice cap type)

The country Congo is located in the African continent. It covers 341,500 square kilometers of land and 500 square kilometers of water. It is the 64th largest nation in the world. After gaining its sovereignty from France, Congo has become an independent state in 1960. The population of Congo is 4,125,916. Brazzaville is the capital city of Congo.

Chile is the place in the world which is known for the least amount of rainfall. The lowest average rainfall in Chile is found in the city of Arica. Average rainfall of Arica is 0.03 inch per year. Atacama Desert surrounds the city of Arica. Some parts of this desert have not received rainfall in more than 500 years. The Andes Mountains and the Chilean Coast Range surrounds the Atacama which block moisture and rain clouds from reaching the desert.

B.  Variation in the amount of rainfall in different places.`

The tropical monsoon climate experiences abundant rainfall like that of the tropical rain forest climate, but it is concentrated in the high-sun season.

A wet season from June to September, when the wind change in direction, the wind blow in the region of low pressure. Winds blow across the equator and blow over the oceans, they are warmer and carry a lot of moisture. They bring a lot of rain. Total rainfall can reach 600 mm

The Turan Type of regions experience extreme climate. It stretches from the Caspian, eastward towards the Pamirs, and from the northern edge of the Plateau of Iran northward, beyond the Sea of Aral, to the Kirghiz steppes. The climate is continental, with hot summers, cool winters and a low rainfall. Due to the availability of vast stretches of grassland, the most important occupation of people in this region is cattle and animal rearing.

The temperature recorded throughout the 24-hour period shows that there is a rhythmic rise and fall of temperature during a day. This phenomenon is called the daily cycle of temperature. The difference between the highest and lowest values of temperature recorded at a locality is referred to as the diurnal range or daily range of temperature.

Water is heated or cooled in a longer period of time than land.  Because of this peculiar characteristic of water, the coastal areas enjoy a moderate climate and the difference in temperature of the warmest and coldest months is not very large. The difference in day and night temperature is also less in the coastal area.

Temperature is a relative term implying a degree of molecular activity or heat of a substance. Temperature is recorded every day the difference between the maximum and minimum temperature for 24 hrs is called the range of temperature and the difference in mean temperature which recorded in the summer and winter is known as annual range of temperature.

Mercury or alcohol is used in the thermometers. A thermometer is a device that is used to measure the temperature. Alcohol thermometer and mercury thermometer are two types of thermometers that are composed of a bulb and a marked glass tube. The main difference between alcohol and mercury thermometer is that the bulb of mercury thermometer is filled with mercury whereas the bulb of alcohol thermometer is filled with alcohol. The alcohol thermometers are less toxic, whereas the mercury thermometers are highly toxic. 

In the continental area, the difference of temperature in the day and night is high. As the land gets heated quickly at the same time it cools down quickly. So during the day due to the sun, the temperature is high at the same time temperature is comparatively low at night because of the absence of Sun rays.

Chenchu people are tribal groups lives in dense forests. They mostly depends on hunting and gathering. Their spoken language is Chenchu. This language is similar to Telugu, as it is from dravidian language family.

Chenchu are tribal group of people or adivasi lives in dense forests. They are mainly depends on hunting and gathering. For their foods they mainly depends on forests. They used to collect forest products and sales in non tribal groups.

The Chenchu people are tribal people or adivasi lives in dence Nallamala forests of Andhera Pradesh. They mainly depends on hunting and gathering. They are totally depends on forest.

The Chenchus have a strong belief system. They worship their deities with great devotion. Lord Eshwara among them is known as "Lingamayya", and Shakti as "Maisamma" or "Peddamma". The worship of both male and female deities is accompanied by puja during the month of "Sravan", that is from July to August.

Chenchu are tribal group of people lives in dense forests . They mainly depends on hunting and gathering. Chenchu people and their relatives live together at a place by constructing huts, this small huts all together termed as pentas by theme.

Chenchu are the tribal group of people or adivasi lives in dense forests. They mainly depends on hunting and gathering. They lives in the district of Guntur, Prakasam, kurnool and mahboobnagar. Thses people totally depends on forests for their livelehood.

The Bonda are tribal group of people lives in dense forests and Ankur valley in Malkangiri district of Orissa. They exchange their agricultural products in a weekly market. Bonda tribes are also known as Bondo and Poroju.

The Bonda are tribal group of people lives in Malkangiri district of Orissa. They are generally semi-clothed. Their cloths are made up of Jutes. These are self weaven and very colourful.

The Bonda are tribal group of people lives in Malkangiri district of Orissa. Bonda tribes collects forest products and also do jhumm type of agriculture. Jhumm is a kind of shifting cultivation. For this they used to clear a peace of forest land and after cultivation they leaves that land and moves to some other place. They used to exchange their agricultural and forest products in weekly markets.

Bonda tribes live in the dense forests and hills of Atuku valley in Malkangiri district of Orissa. They still exchange their agricultural products in weekly market. A interesting fact about Bonda tribe is there are more female then male. Female prefer to marry young male so they can earn till their old age.

Chenchu is a tribe living in the states of Telangana, Andhra Pradesh, Odisha, and Karnataka. The members of this tribe mostly depend on hunting and gathering. Chenchu people have their own council to solve the problem among themselves. They select a headman among the senior people among them. The headman is called as Pedda Manuah.

The Bonda are tribal group of people lives in Malkangiri district of Orissa. The language spoken by Bonda tribes is unique. It is called Remo. It is a unwritten language. This language is from Austroasiatic language family of Munda branch.

Bonda is a tribal group of people lives in the isolated hill region of Malkangiri district  Southwest Odisha. According to 2011 census, the population of Bonda tribe is only 1200. Only 6 percent of Bonda tribes are literate. Their marriage age is also very early, Bonda boys marry at the age of 10 to 12 years. The rate of life expectancy is very low. That is why their population of this tribe is decreasing day by day.