CURRENT Current is the rate of flow of an electric charge. If ‘q’ is the charge (in coulomb) and ‘t’ is the time (in seconds) then, Current (I) = q/t S.I unit of current = Ampere (A) Current is a scalar quantity. CIRCUIT It is the arrangement that shows how different component in a circuit […]
Tag: Notes for class 10 science
HUMAN EYE The front part of the eye is covered by a transparent spherical membrane. called cornea Light enters the eye through cornea and the space behind the cornea is filled with a liquid called aqueous humour. Just behind the cornea there is a dark coloured muscular diaphragm called iris which has a small circular […]
Light is a form of energy and it can be transferred into other forms of energy. Light does not require any material medium for its propagation. The velocity of light is 3 × 108 m/s. REFLECTION OF LIGHT In the reflection of light, a highly polished surface like mirror, reflects most of the light falling […]
HOW DO ORGANISMS REPRODUCE Reproduction is biological process in which an organism produces young one of the same kind. Reproduction is not necessary to maintain the life of an organism like other life processes. Reproduction requires lot of energy to be spent then why does organism reproduce? Different organisms have different life span. After certain […]
In plants and animals we see different kind of movement such as a plant move towards sunlight, root grows only towards gravity. In animals, we see cat is running may be in search of mice or for fighting, buffaloes chew cud to break to tough food, you whisper when you have to talk to your […]
The processes that occur to maintain life in a living being are called life processes. This includes nutrition, movement, growth, oxidation of food, breathing, excretion, control and coordination and finally reproduction. Multicellular organisms have specialized organs to perform all these different functions, they have well organized structures such as tissues, organs and organ systems. These […]
PERIODIC CLASSIFICATION OF ELEMENTS EARLY ATTEMPTS AT THE CLASSIFICATION OF ELEMENTS Scientists made several attempts to classify elements according to their properties and obtain an orderly arrangement. The earliest attempt to classify the elements resulted in grouping of elements as metals and non-metals. Dobereiner’s Triads This classification is based on the atomic mass. According to […]
BONDING IN CARBON: COVALENT BOND → The atomic number of carbon is 6. It’s electronic configuration is 2, 4. It requires 4e– to achieve the inert gas electronic configuration. But carbon cannot form an ionic bond because it could gain 4e– forming C-4 anion. But it would be difficult for the nucleus with six protons […]
There are about 115 elements. Based on their properties they have been classified into: → METALS→ NON – METALS→ METALLOIDS METALS: the elements which are present on the left hand side of theperiodic table. They have 1, 2 or 3 valence electrons and loose electron to form positively charged ions called cations. Hence they are called […]
INDICATORS: It is a substance or a dye which tells us whether the given substance is acid or base by changing its colour. LITMUS: most common indicator. Natural colour is purple. Acids turn blue litmus red. Bases turn red litmus blue. Obtained from litmus (symbolic association between algae and fungi.) TURMERIC: it is a yellow […]
Sheet Digest 