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Management of Natural Resources CLASS: X NCERT (CBSE) BIOLOGY
Summary • Environment refers to the natural elements that make up the earth and surround living organisms • The abiotic or physical aspects of the environment refer to elements like air, soil, water etc. The biological or biotic components of environment are the plants and animals • Natural resources constitute the air, water, soil, minerals, coal, petroleum, animals and plants. Everything that we...
Magnetic Effects of Electric Current CLASS: X NCERT (CBSE) PHYSICS
Summary • An electric current produces a magnetic field. • A magnetic field exists in the region surrounding a magnet, in which the force of the magnet can be detected. • Field lines are used to represent a magnetic field. • The magnetic field lines of a straight current are circular with centres on the wire carrying the current. • The magnetic field inside...
Electricity CLASS: X NCERT (CBSE) PHYSICS
Summary 1) Electric potential is the condition that determines direction of flow of charge. Electrical potential at a point in an electric field is defined as the amount of work done in bringing a unit positive charge from infinity to that point. 2) Electrical potential is a scalar quantity. 3) The potential difference between two points in an electric field is the...
Human Eye and Colourful World CLASS: X NCERT (CBSE) PHYSICS
Summary Accommodation of the Eye:The process by which the ciliary muscles change the focal length of an eye lens to focus distant or near objects clearly on the retina is called the accommodation of the eye. Power of Accommodation: The ability of the eye to focus objects lying at different distances is called the power of accommodation of the eye. Near point...
Light-Reflection and Refraction CLASS: X NCERT (CBSE) PHYSICS
Summary Reflection of Light Light is a form of energy which can be reflected either by a plane mirror or spherical mirror. Depending upon the type of mirror used for reflection of light the use of reflecting surface also varies. Light: Light is an external cause responsible for sensation of vision. Reflection The phenomenon by which a ray of light changes the direction of propagation...
Heredity and Evolution Class: X CBSE NCERT
Summary An important result of the reproductive cycle is production of similar featured individuals for generations. The transmission of characteristics through successive generations refers to heredity. These characteristics include all physical, physiological and psychological characteristics in organisms. We refer to them as traits. The study of the mechanism of transmission of characteristics from parents to the next generations is called genetics. • Heredity may be defined...
How do Organisms Reproduce CLASS: X NCERT (CBSE) BIOLOGY
SUMMARY • Reproduction is defined as the production of individuals of the same species, that is the next generation of the species. • There are basically two types of reproduction - asexual and sexual. • Asexual reproduction involves only one parent and the offspring is genetically similar to the parent. Sexual reproduction involves two parents and the offspring has a fusion of...
Life Processes: Nutrition CLASS: X NCERT (CBSE) BIOLOGY
Summary Nutrition can be defined as the process by which an organism obtains food that is used to provide energy and materials for its life sustaining activities. There are basically two modes of nutrition: A. Autotrophic B. Heterotrophic Autotrophic Nutrition Organisms which synthesize their own food are called the autotrophs and the process is called autotrophic nutrition. They include all green plants and some bacteria...
