Soil composition is important because it determines the fertility of the soil and its ability to support plant growth. Soil is made up of minerals, organic matter, water, and air, which provide nutrients, moisture, and space for roots to grow. ...
Category: Class 8 Science
NCERT Solutions and important questions for Class 8 science for CBSE 2020-2021.
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Monocots have one cotyledon in their seeds, parallel venation in leaves, and fibrous roots, while dicots have two cotyledons, reticulate venation, and taproots. Explanation: These differences help in categorizing plants, providing insights into their structure, nutrient storage, and root system, ...
Viruses reproduce only inside host cells (bacteria, plants, or animals). Common ailments like cold, flu, cough, and serious diseases like polio and chickenpox are caused by viruses. NCERT Class 8 Science Chapter 2 Microorganisms: Friend and Foe
Microorganisms are classified into bacteria, fungi, protozoa, and some algae. NCERT Class 8 Science Chapter 2 Microorganisms: Friend and Foe
Microorganisms are tiny living organisms not visible to the naked eye. They are called microbes because of their small size. NCERT Class 8 Science Chapter 2 Microorganisms: Friend and Foe
Freshly harvested grains with more moisture are prone to spoilage and attacks by organisms, rendering them unfit for use or germination. NCERT Class 8 Science Chapter 1 Crop Production and Management
Farmers use jute bags, metallic bins, silos, and granaries for storage. Neem leaves are used at home, while large godowns may require specific chemical treatments. NCERT Class 8 Science Chapter 1 Crop Production and Management
Drying harvested grains reduces moisture, preventing spoilage and attacks by insects, bacteria, and fungi, ensuring the grains remain fit for use and germination. NCERT Class 8 Science Chapter 1 Crop Production and Management
Weedicides may affect the health of the person handling the sprayer. Precautions include covering the nose and mouth with a cloth during spraying to minimize health risks. NCERT Class 8 Science Chapter 1 Crop Production and management
The process is called threshing. It is carried out using a machine called a ‘combine,’ which functions as both a harvester and a thresher. NCERT Class 8 Science Chapter 1 Crop Production and Management