Free PDF Worksheets for Class 7 Human Environment Interaction - Perfect Exam Prep
FAQs on Practice CBSE Class 7 Geography Worksheets on Human Environment Interaction – 2025-26
1. What are the important cash crops grown in the Amazon basin, and what is 'slash and burn' agriculture?
The main cash crops grown in the Amazon basin include coffee, maize, and cocoa. People in the rainforest also practise 'slash and burn' agriculture. This is a farming method where farmers clear a piece of land by cutting down trees and bushes. These are then burned, which releases nutrients into the soil, making it fertile for a few years.
2. Name two important types of fauna found in the Ganga-Brahmaputra basin and mention their habitats.
Two important types of fauna in the Ganga-Brahmaputra basin are:
The Bengal Tiger: Found in the delta areas, particularly the Sundarbans mangrove forest.
The One-Horned Rhinoceros: Found in the plains of Assam, especially in wildlife sanctuaries like Kaziranga National Park.
3. What are the key climatic conditions of the Sahara desert, and how do organisms adapt?
The Sahara desert has a scorching hot and parch dry climate. Days are incredibly hot with temperatures soaring above 50°C, while nights can be freezing cold. Organisms adapt in various ways:
Plants: Cacti have waxy stems and spines instead of leaves to reduce water loss.
Animals: Camels have long eyelashes to protect from sand and can store fat in their humps for energy, allowing them to survive long periods without food or water.
4. What are the major economic activities for people living in the Prairies?
The Prairies are known as the "Granaries of the World" due to extensive agriculture. The major economic activities are:
Farming: Large-scale, mechanised cultivation of crops like maize and wheat is the primary occupation.
Cattle Ranching: Large ranches, called homesteads, are used for rearing cattle, especially in the western parts.
Dairy Farming: This is another significant activity, extending from the Great Lakes to the Atlantic Coast.
5. List three important differences between life in the hot Sahara desert and the cold Ladakh desert.
As per the Class 7 CBSE syllabus for 2025-26, key differences are:
Climate: The Sahara experiences extremely hot days and cold nights, while Ladakh experiences extremely cold days and freezing nights.
Agriculture: In the Sahara, people grow crops like dates and barley near oases. In Ladakh, during summer, people grow crops like apples, apricots, and walnuts.
Clothing: People in the Sahara wear heavy robes to protect from sun and hot winds. People in Ladakh wear heavy woollens to protect from severe cold.
6. Why is the Ganga-Brahmaputra plain one of the most densely populated regions in the world?
The Ganga-Brahmaputra plain is densely populated primarily due to its highly favourable geographical features for human settlement. The plain areas provide flat, fertile land which is ideal for agriculture. The numerous rivers in the basin ensure a consistent supply of water for both farming and daily needs. This combination of fertile soil and abundant water supports the cultivation of staple crops like rice and wheat, allowing a large population to be sustained.
7. How does the vegetation in the temperate grasslands of the Prairies differ from that in the Velds?
The primary difference in vegetation is due to rainfall. The Prairies in North America receive more rainfall, so the grass is generally tall and lush, making it ideal for extensive grain farming. In contrast, the Velds of South Africa are located on a plateau and receive less rainfall, resulting in shorter, sparser grass. Red grass grows in bush velds, while acacia and maroola are found in the high velds. This makes the Velds more suitable for cattle and sheep rearing than for large-scale crop farming.
8. How has the development of the Trans-Amazonian highway impacted the Amazon rainforest?
The construction of the Trans-Amazonian highway has had a significant and often negative impact on the Amazon rainforest. It has made previously inaccessible parts of the forest reachable, leading to:
Increased Deforestation: The highway has accelerated logging, mining, and the clearing of land for cattle ranching and farming.
Impact on Indigenous People: It has disrupted the traditional way of life for many indigenous communities, forcing them to relocate or adapt to new, often challenging, circumstances.
Loss of Biodiversity: The destruction of the habitat threatens countless species of plants and animals unique to the rainforest.
9. Explain the significance of the term "sea of grass" for the Prairies and how it influences occupations.
The term "sea of grass" is used to describe the Prairies because, for as far as the eye can see, there are vast, rolling plains covered in grass with very few trees. This landscape directly influences the primary occupations. The deep, fertile soil beneath the grass makes the region perfect for large-scale mechanised agriculture, particularly for growing wheat, earning it the title "Granaries of the World." Where the land is hilly or less suitable for farming, the endless grass provides ideal grazing for cattle, leading to the second major occupation: cattle ranching.
10. Why is Ladakh known as a 'cold desert,' even though it is a cold region?
Ladakh is called a 'cold desert' because it experiences the defining characteristic of a desert: extremely low precipitation. It is located in the rain shadow of the Himalayas, which means the high mountain ranges block rain-bearing clouds from reaching the area. As a result, Ladakh receives very little rainfall, often less than 10 cm annually. Therefore, despite its freezing temperatures, its dryness (lack of moisture) is what classifies it as a desert, distinguishing it from hot deserts like the Sahara.
