Learning Resource for CBSE students
Resources provided by nature on Earth which can be utilized by living organisms to sustain their life are called natural resources. These include air, water, soil, sunlight, minerals, etc. All these resources are found accumulated in different layers of Earth.
Disease refers to any condition that disturbs or modifies the normal functioning of the living organisms. Each organ system of our body has specific organs to perform particular functions. In the presence of a disease, functioning or the appearance of one or more systems of the body may change. These changes give rise to symptoms and signs of disease.
Health is the state of proper functioning of body and mind. Any malfunctioning at the level of cells, organs or organ systems can be caused by various agents/factors.
The method of arranging organisms into groups on the basis of their similarities and differences is called classification.
First level of classification among plants depends on whether the plant body possesses well-differentiated distinct cellular components or not. Next level is based on the presence or absence of special vascular tissues for the transport of water and other substances. Further classification takes into account the ability to bear seeds and whether seeds are enclosed within the fruits or not.
Depending on these characteristics, kingdom-Plantae is divided as of Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms.
Animals are the eukaryotic, multicellular and heterotrophic organisms. Their cells do not have cell walls and most of them are mobile. Kingdom-Animalia is thus classified on the basis of the extent and type of body design.
Based on morphology, animal tissues can be grouped into four basic types. Multiple tissue types comprise organs and body structures. While all animals can generally be considered to contain the four tissue types, the manifestation of these tissues can differ depending on the type of organism.
The four basic Animal Tissues are: (i) Epithelial Tissue; (ii) Connective Tissue; (iii) Muscular Tissue; and (iv) Nervous Tissue.
The tissue is a group of cells. The cells in a tissue can be similar or different. The groups of cells thus formed carry specific functions. A group of different tissues makes an organ. There are two types of tissues : (i) Plant Tissue; and (ii) Animal Tissue.
A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles. Here we cover them all.
Atom consists of electrons, protons and neutrons. There is an interesting story on how electrons, protons and neutrons were discovered and how the structure of atom has come to be. It’s worth knowing about the fundamental particles of matter.
Matter is composed of Solids, Liquids and Gases. For a better understanding of Matter, there is a need to differentiate it on the basis of composition. On the basis of composition, matter can be classified as:
(i) Pure substances; and
(ii)Mixtures. Â
Try these Class X one mark Chemistry question on “Chemical Equations & Reactions” to check your preparedness…[…]
Try these Class X one mark biology question to check your preparedness…[…]
Try these Class X one mark chemistry question to check your preparedness…[…]
A simple representation of four chapters of Chemistry for Class X in the form of Maps for easy grasp of topics.
This simple diagram will help you to remember two chapter namely Electricity and Second Magnetism and its Properties in a snapshot.
