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SCIENCE 6.
UNIT 6. ENERGY.
CONTENTS: 1.– Energy. 2.– Forms of energy & transformation: 2.1.– Mechanical: kinetic / potential 2.2.– Chemical. 2.3.– Thermal. 2.4.– Nuclear. 2.5.– Electrical. 2.6.– Light. 2.7.- Sound. 3.– Renewable / Non-renewable energies. 4.– Light: 4.1.– Propagation of light. 4.2.– Types of bodies. 4.3.– Reflexion / refraction. 5.– Sound: Characteristics.
C.E.I.P. SANTA ANA (Madridejos)
ENERGY is the ability to do a work. .- There are different types of energy. .– It can be stored. .– It can be t ransformed. 1
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1.– ENERGY: Energy is the property of objects to produce different changes in themselves or other objects like performing a mechanical work, emitting light, heating a material... Energy is the ability to do a work. Energy can be used when it is needed, but it can be stored: .- Plants store sunlight energy, and many years later it is transformed into petrol, gas, coal… that we use when we want to get heat or when we use a car or a motorbike. .- Animals store energy (fats, carbohidrates…) that they use to grow, to run, to live… They are natural ways to store energy. .- Energy can be stored in artificial ways too (when we use a battery…) There are different types of energy, and energy can be transformed from one kind to another. For example, plants have energy (chemical energy), and when we burn a piece of wood we get heat, so we are transforming chemical into thermal energy. 4
2.– FORMS OF ENERGY: There are several forms of energy, and they can be transformed into other ones. 5 6 7 8
USEFUL WORDS: .– energy .- to store .– thermal .– electrical
.– mechanical energy .– magnetic
.– kinetic energy .– chemical
.– potential energy .– nuclear