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Light sources can be divided according to different criteria: Natural light sources that are all the time or occasionally present in nature without human intervention. Artificial light sources that were introduced by humans because of certain advantages. The most famous natural source is the sun, the most famous artificial source is ...
describe various types of sources of energy e.g. fossil fuels, water, wind, biomass, sea, geothermal, nuclear energy; recognise that the sun is the ultimate source of energy;
NEL 10.1 Light Energy and Its Sources 291 Thermal energy can heat a metal to such a high temperature that it emits light. This light ranges from dull red to yellow to white and blue-white as the metal gets hotter. The colour of the emitted light indicates when the molten metal is ready to be poured. Light from Phosphorescence
Task 1: What do I know about energy sources on Earth. Discover: What do I know, think, and feel about energy sources on Earth? Understand: What are some different perspectives related to energy sources? Act: What are the characteristics of sustainable energy? Task 2: Which energy sources could help my communitycreate a sustainable energy future?
The light we see can be divided into two categories: Light sources and reflected light. The sources of light can then be looked at in two sub categories: Natural light sources and artificial light sources. Both of these types of light sources can either come from hot sources or from cool sources. The organizer below will help you to follow this ...
þ Describe the sources and effects of heat. þ Explain thermal expansion of solids, liquids and gases. þ Explore the effects and applications of expansion and contraction of solids.
Energy cheat sheet What is energy? Energy is the ability to make changes or the capacity to do work. Energy appears in many different forms including kinetic (movement), potential (stored energy), gravitational, light, heat, chemical, elastic and electrical. The Sun is the source of all energy on Earth. The energy from
