Class 4 Social Science Natural Assets Soil and Water Question and Answers.
What is a desert soil?
Desert soil is sandy, dry, and infertile. It is found mainly in the desert regions of Rajasthan and Gujarat.
What is the color of mountain soil?
Mountain soil is dark brown or black in color.
Name any two sources of fresh water.
Two sources of fresh water are rivers and ponds.
Which states are benefited from the Bhakra Nangal Dam?
The states benefited from the Bhakra Nangal Dam are Himachal Pradesh, Punjab, Haryana, Rajasthan, and Delhi.
Name two seasonal rivers.
Two seasonal rivers are Krishna and Kaveri.
What is soil erosion? Give any two reasons for soil erosion.
Soil erosion is the process where the top layer of soil is washed away by fast-flowing water or wind. Two reasons for soil erosion are deforestation and overgrazing by animals.
Name the different types of soil. Which is the most fertile soil?
The different types of soil are alluvial, black, red, laterite, mountain, and desert soil. Alluvial soil is considered the most fertile.
What are the means of irrigation in South and Central India? Why?
Tanks are the means of irrigation in South and Central India. This is because low-lying areas are filled with rainwater during the rainy season, and these tanks help store and distribute water for irrigation in the dry season.
How can we prevent soil erosion?
Preventing soil erosion involves measures such as not cutting trees, constructing dams on rivers, afforestation, avoiding overgrazing, and using natural fertilizers.
What are the uses of a dam? Name some dams built in India.
Dams have multiple uses, including irrigation, hydroelectricity generation, flood control, and fish breeding. Some dams in India include Bhakra Nangal Dam, Hirakud Dam, Nagarjuna Sagar Dam, Tungabhadra Dam, and Sardar Sarovar Dam.
What is soil, and why do plants need it?
Soil is the top layer of Earth’s surface, providing a medium for plants to grow. Plants need soil for nutrients and support.
How is soil formed, and why is the process slow?
Soil is formed through the weathering of rocks. The process is slow because rocks break down into smaller particles over thousands of years due to factors like temperature, wind, and water.
Name three types of organisms that live in the soil?
Earthworms, ants, and beetles are examples of organisms that live in the soil.
Why do farmers add manure and fertilizers to soil?
Farmers add manure and fertilizers to soil to enhance its fertility and provide essential nutrients for plant growth.
