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Define energy, distinguish types of energy, and describe the nature of energy changes that accompany chemical and physical changes. Distinguish the related properties of heat, thermal energy, and temperature. Define and distinguish specific heat and heat capacity, and describe the physical implications of both.
Identify different forms of energy with examples. Differentiate between kinetic and potential energy. Demonstrate how one form of energy can be converted into other form of energy. Identify that energy is dissipated in atmosphere. Explain that energy is conserved during conversion of different forms of energy.
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.
These forms of energy may come from a variety of sources. It is important to recognise the difference between an energy source and an energy form — that is, the energy source produces the particular form(s) of energy. For example, food is a source of chemical potential energy.
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;
16 kwi 2019 · For example, microwave ovens produce energy to cook food, but we cannot see that energy. In contrast, we can see the energy produced by a light bulb when we switch on a lamp. In this section, we describe the forms of energy and discuss the relationship between energy, heat, and work.
thermal energy, gravitational energy, electromagnetic-radiation energy, chemical energy, and nuclear energy, have been defined to explain all known natural phenomena.
