Understanding Heat Phenomena

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What is heat?
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Heat is a form of energy that is transferred between objects with different temperatures.
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How is heat transferred?
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Heat can be transferred in three ways: conduction, convection, and radiation.
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What is conduction?
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Conduction is the transfer of heat through direct contact between materials.
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What is convection?
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Convection is the transfer of heat through a fluid, such as air or water, where hot fluid rises and cold fluid sinks.
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What is radiation?
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Radiation is the transfer of heat through electromagnetic waves, such as sunlight warming the Earth's surface.
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What are good conductors of heat?
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Metals like copper and aluminum are good conductors of heat.
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What are insulators?
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Insulators are materials that do not conduct heat well, such as wood, plastic, and rubber.
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Why does metal feel colder than wood at the same temperature?
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Metal feels colder because it conducts heat away from your skin faster than wood does.
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What is specific heat capacity?
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Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.
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Why do we wear wool in winter?
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Wool is a good insulator, trapping heat from the body and keeping us warm.
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How does a thermos work?
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A thermos reduces heat transfer by using a vacuum between two walls, minimizing conduction and convection.
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What role does heat play in changing states of matter?
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Heat can cause substances to change states, such as melting ice into water or evaporating water into steam.
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What is thermal expansion?
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Thermal expansion is the increase in volume of a substance due to an increase in temperature.
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What is a temperature?
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Temperature is a measure of the average kinetic energy of the particles in a substance.
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How is heat different from temperature?
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Heat is the total energy of molecular motion in a substance, while temperature measures how hot or cold a substance is.
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