Heat and temperature
Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. Thermal energy is involved in many processes in our daily life, like cooking food, making a hot drink, showering with hot water and heating our home with radiators. For all of these processes we need heat sources, like a gas burner, a wood fire or a radiator.
Esta secuencia contiene:
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14 actividades
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46 recursos
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Secuencia didáctica
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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1. Energy transfer: heat Heat or thermal energy is the energy that is transferred from hot bodies to cold bodies. [...]
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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1.1. Heat The particles that make up matter store energy: Heat or thermal energy is the energy that is transferred from hot bodies to cold bodies (figure 1). [...]
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2.1. What is temperature? When a body receives energy in the form of heat, it stores it in the form of internal energy and its particles move more quickly. Temperature is an indicator of the speed of a body's particles. [...]
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3.1. Increase in temperature Heat must be added to increase the temperature of a body. This causes the particles that make up the body to increase their speed. [...]
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4.1. Expansion The term expansion refers to the increase in a substance's volume. This causes a reduction in the substance's density. The opposite effect is called contraction. [...]
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5.1. States of matter You have already learnt that there are three states of matter in nature: solid, liquid and gas. Remember that solid particles have low mobility as they are in a fixed position. [...]
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Heat transfers from a hot object to a cold object by means of three mechanisms: conduction, convection and radiation. 6.1. Conduction Heat is transmitted through solid substances by conduction (figure 1a). [...]
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7.1. Thermal conductors and insulators Materials are classified into heat conductors and insulators, according to how they transmit heat. Conducting materials, like metals, let heat pass through them by conduction. [...]
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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Heat or thermal energy is the energy that a body transfers to a colder body at a certain temperature. [...]
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