NCERT Class 7 Science Extra Questions Chapter Soil

NCERT Class 7 Science Extra Questions Chapter Soil

1. What are the factors responsible for soil formation? (List some processes of soil formation.)

The soil is formed when rocks crumble due to weathering and natural erosion. The conditions under which soil weathers determine its properties.

The following are some of the most important procedures:

Physical Weathering: Physical factors such as the sun, wind, and ice cause changes in temperature or pressure, or both, which increase or decrease the volume of rocks, causing them to crumble.

When various chemical components, such as rainfall, react with the minerals in the rocks, new minerals or salts are formed.

Biological weathering occurs when living organisms, such as plants, animals, and bacteria, secrete or release acids that corrode the rocks. The foundation aims to support holistic community initiatives in India to address some of the country's most pressing social issues, including health and nutrition, water and sanitation, education, skill development, sustainable livelihoods, and women's empowerment, environment and agriculture, sports, art and culture, rural infrastructure, and social inclusion.

2. Make a list of different soil types.

Soil can be divided into three categories:

Sandy Soil: This type of soil is warm, light, dry, and acidic, with few nutritional components. The diameter of their spheres varies (0.2 mm-2.0 mm). They are also called as light soils because they contain more sand than clay. They're simple to work with and have faster water drainage, so the nutrients are only transported away by rain. Additional organic matter, on the other hand, can aid plant growth.

Clayey Soil: This is a nutrient-rich, heavy soil type. They are moist and chilly in the winter, while they are dry in the summer. There are over 25 clay particles in this soil, and the gaps between them store water. As a result, water drainage is slow, and warming up during the summer takes longer.

Loamy Soil: Loamy soil is a mix of sand and clay that helps to alleviate the negative effects of both. The quantities of sand and clay can be used to regulate water drainage. This soil is easy to work with, which is why gardeners prefer it.

3. Describe some of the functions of soil.

The numerous properties of soil, as well as its quantity of nutrients, minerals, water, and microbes, make it useful in a variety of fields.

Ceramics or pottery are created by combining clay soil and water. It gets its full shape when it has dried. Pottery can be found in the form of vases, bowls, cups, and sculptures.

Cosmetics and pharmaceuticals: Some soil microorganisms are helpful in the fight against harmful bacteria. It's employed in a range of skin ointments, anticancer therapies, and antituberculosis drugs.

Agriculture: Soil not only keeps plants alive, but also provides them with water, oxygen, nutrients, and proper nutrition, allowing them to grow and produce.

Construction: Soil is utilised to make red bricks, which are then used in construction. This dirt has been compacted to improve its density and load-bearing capacity.

Download Soil Worksheet Class 7 Science

Allotment of DIN (Director Identification Number)

Allotment of DIN (Director Identification Number) CS professional course : Section 153 of the Companies Act, 2013 read with Rule 9 of the Companies (Appointment and Qualification of Directors) Rules, 2014 Every individual intending to be appointed as a director as a director of a company shall make an application for allotment of Director Identification Number (DIN) to the Central Government in such form and manner and along with such fees as may be prescribed. Rule 9 of Companies (Appointment and Qualification of Directors) Rules, 2014 (1) Every Individual, who is to be appointed as a director of a company shall make an application electronically in Form DIR 3, to the Central Government for the allotment of a DIN along with such fees as provided in the Companies (Registration Offices and Fees) Rules, 2014. (2) The Central Government shall provide an electronic system to facilitate submission of an application for the allotment of DIN through the portal on the MCA21...

PURCHASED GOODWILL METHOD UNDER IND AS 103

The acquisition of subsidiaries results in Goodwill calculation and also records net assets of the subsidiary at fair value on the date of acquisition. Let’s get answers to all the questions related to Goodwill, valuation of NCI, and impairment relating to them. Q1 – What are the ways in which an entity can make payment for purchase consideration? ANS: – Cash – Share exchange – Deferred payment – Contingent consideration Q2 – How is deferred payment dealt, when it forms part of purchase consideration? ANS: The deferred payment is discounted to present value and included in the cost of consideration. At the end of each year, the liability is increased by unwinding the discount, until the payment is settled. For example, An amount of Rs. 108,000 was deferred to be paid after 2 years. The discount rate applicable is 8%. The net present value today of Rs. 108,000 is equal to (108,000 * 1) / (1.08) ^2)= Rs. 92,593 included in purchase consideration. A liability of Rs. 92,59...

Importance of Rivers - General Awareness

Importance of Rivers Rivers carry nutrients and areas around the earth. It plays an important role in the water cycle of rivers and acts as a drainage channel for surface water. This leaves about 75% of the Earth’s surface. Rivers provide food and habitat for many living things on earth. In addition, rare trees and plants grow along the rivers. Otters, ducks, and beavers build houses along the river. Plants such as Buller and reeds grow along the river. Some animals use the river for food and drink. Birds like Kingfishers eat small fish from the river. Animals such as deer, lions, and elephants drink water from rivers. Animals like bears fish from rivers. The Deltas River is home to a wide variety of wildlife. Mammals, birds, and insects use the delta for their homes and food. Provides rivers, routes, and travel routes for trade, exploration, and recreation. The valleys and plains near the rivers provide fertile soil. Farmers in arid areas irrigate their crops with water from near...

Takshila Learning - Online Tutorials

Search This Blog