Natural Science Grade 7 term 3&4 CAPS |Questions Solved 100% Correct!! Latest Update 2024

Natural Science Grade 7 term 3&4 CAPS |Question s Solved 100% Correct!! Latest Update 2024 Ener gy - ANSWER The ability to do work Work - ANSWER When something is moved Law of the conservation of energy - ANSWER Energy cannot be created nor destroyed but only transferred within a system Energy sources - ANSWER Sun Wind Fuel -fossil fuels wood food Water Sun as an energy source - ANSWER Plants use solar energy for photosynthesis. Herbivores consume the plants or we do so . Wind as an energy source - ANSWER Moves boats with sails. Wind turbines can generate electricity or pump water. Water as an en ergy source - ANSWER Moving water can turn turbines which can generate electricity or grind in a mill. Fuels - ANSWER Fossil fuels -oil coal natural gas Wood and food Non renewable - ANSWER Cannot be remade or cannot be replaced fast enough Renewable - ANSWER Limitless amounts and can be remade quick enough Types of energy - ANSWER Heat,electrical,kinetic,potential,light,sound,chemical and elastic Potential energy - ANSWER Gravitational Positional Chemical Elastic Kinetic energy - ANSWER Movement Elastic energy - ANSWER Tension Electrical energy - ANSWER Electrons Heat energy - ANSWER Degrees Celsius Thermometer - ANSWER Measure temperature Insulator - ANSWER A bsorbs heat slowly and releases it quickly Conductor - ANSWER Absorbs heat quickly and releases it slowly Conduction - ANSWER Transfer of heat between solid via contact Convection - ANSWER Transfer of heat in liquids and gases using the theory that hot gas/liquid rises and cold gas/liquid sinks