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Std 8 SOURCES OF ENERGY

SOURCES OF ENERGY 10 SOURCES OF ENERGY points to remember : 1. Energy : Energy is needed to do work. Electrical energy, light, sound, heat, gravitational energy, atomic energy, etc., are different forms of energy. It can be converted from one form into another. 2. Fuel : A substance that produces energy on burning is called a fuel. Lakhs of years ago, remnants of plants and animals got buried into the earth and were converted into fossil fuels due to the tremendous pressure of the earth’s layers above them and the heat inside. Coal, mineral oil and natural gas are fossil fuels. Their deposits are limited. 3. Sun : The sun is the only source of energy in the solar system. The energy that we need over one year is provided by the sun in just 40 minutes. Solar heaters and solar cookers can be used to heat water and cook food. In a solar cell, solar energy is converted into electrical energy. 4. Conventional and non-conventional sources of energy : Co...

Std X ICT Practicals

Practical Name:  To create a Power Point Presentation on ‘Impact of ICT in Education’. Tools/Software:  Computer and MS PowerPoint 2007 Application Description/Theory:  MS PowerPoint is most popular Presentation software. PowerPoint provides numerous features that offer flexibility and the ability to create a professional presentation with animation effects, sound effects, background music playback, record voice for narration, etc. We can also broadcast the presentation to specific users via a link and Windows Live. This Presentation describes the way ICT has made a place in the field of Education and changed the teaching and learning process Procedure:  1)         Gather important points on the Impacts of ICT on education from your text book. Jot down the content of each slide (about 8 to 12 slides) 2)         Download images for your presentation using ...