class 7 Geography
Life In Tropical and Subtropical regions
Questions Covered are:
Few important terms:
Where do Tropical regions lie?
List the difference between Amazon Basin and Ganga Brahmaputra basin?
One word question answers:
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Few important terms:
Basin:
An area of the land around river with streams running around it.
Delta:
Triangle shape area of the land of the river splitting into small rivers.
Estuary:
It is the wide portion of river that enters into the sea and flows in a single channel into the ocean
Perennial Rivers:
River flowing throughout the year
Quinine: Drug made from the bark of Cinchona tree
Silt: Mud carried by the flowing water.
Where do Tropical regions lie?
Tropical regions lie between Tropic of cancer and Tropic of Capricorn.
Approximately 20 degrees North and 20 degrees South
List the difference between Amazon Basin and Ganga Brahmaputra basin?
| Amazon basin | Ganga Brahmaputra basin |
| Amazon river is the most important river of South America. | Ganga is the longest river in India |
| The Amazon River along with its tributaries form the largest river basin in the world | River Ganges and Brahmaputra River, also known as Tsang Po, forms the Ganga Brahmaputra basin |
| Amazonia, the term used for Amazon basin. It lies between the Brazilian highland in South and Guiana Highland in North. | Ganga Brahmaputra basin covers a large part of Northern India and almost entire Bangladesh. |
| Amazon Basin has very hot and wet climate throughout the Earth. Amazon receives heavy rainfall of 250 cm annually. | Climate of Ganga Brahmaputra basin consist of hot summers, wet monsoons and cold winters |
| Amazon has Tropical Evergreen Forest. | Ganga Brahmaputra Basin consists of tropical deciduous forest |
| Important trees are Mahogany, Palm, Ebony, Rosewood and Rubber. | Important trees are Sal, Teak, Bamboo, Peepal. |
| The animals found in this basin are Jaguars, Armadillos, Alligators, Anaconda, Piranha, Toucans, Hummingbirds etc. | Animals found in Ganga Brahmaputra basin are Rhinoceros, Elephants, Royal Bengal Tigers etc. |
| Amazon Basin has sparse/ very less population. Tribal people follow shifting agriculture. Seringueiros people gather latex from the rubber trees in the forest. | Thickly populated due to perennial rivers, so agricultural is the main occupation. Agro based industries such as cotton, jute, silk, tea are the main ones found here. |
| Manaus is a major rubber collecting centre. In Brazil Belgium and in Peru. Iquitos is important riverine port of Amazon basin. | Many towns and cities are developed along the banks of the river like Kanpur, Patna, Kolkata. These are also tourist spots. |
One word question answers:
Francisco de Orellana discovered Amazon River
Amazon River starts from Andes and drains into Atlantic Ocean
Amazon Basin is also called as Amazonia
In Amazon that is no dry season
Amazon receives convectional rainfall accompanied by lightning and Thunder
Selvas unique vegetation is created by the thick cover of plants and trees of Amazon
Lightest wood is Balsa used to make the raft, toys and models of aeroplane
Shoe Polish is made from the wax of Carnauba trees.
Chewing gum is made from the juice of Chicle trees
Amazon tribal people live in huts and are made up of thatched roofs.
Cassava is the staple food of tribal people
Manaus is major rubber collecting centre
Ganga Brahmaputra basin has length of 2500 km and its width varies from 100 to 400 km
River Ganga originates from Gangotri Glacier
Ganga is the longest river in India
Tributaries of Ganga are Gandak, Gomti, Ghagra, Yamuna, Kosi, Son, Damodar etc.
Ganga Brahmaputra Delta or Sundarbans Delta is largest and the fastest growing delta.
Mangrove forest are found in this Ganga Brahmaputra base
Sundari trees are found in large numbers
Handicrafts in Ganga Brahmaputra basin are metalwork, cane work, clay work.
Chilika Lake, is the brackish water lagoon spread over Puri district of Odisha.
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