Heat, light and sound Flashcards
What is heat?
It is a form of energy that can be transferred through solids, liquids and gases
How are atoms considered in the particle model?
Small, hard balls
In a solid-state, the particles are loose or closed packed?
They are closely packed and vibrate on the spot but keep the shape of the substance.
How are particles in a liquid state?
They are packed together too, but are also free to move or low over each other
How are particles in gas?
They are not together at all and they are free to move until they collide with other gas particles.
What does heating do to a particle?
It adds some energy and is stored in the material itself
and the remaining heat energy increases the kinetic energy of the particles in the material.
What is kinetic energy?
It is the energy of the movement
What is the temperature of a substance?
It is a measure of the average kinetic energy of its particles.
What particles move faster? Hot or cold?
Hot
What is a thermometer?
An instrument to measure temperature. It contains alcohol or mercury in a narrow glass tube
How is temperature read?
It is read from a scale on the thermometer corresponding to the expansion or contraction fo the liquid,
How is it measured?
In degrees Celsius (“C), Farenheit ( F) and kelvin (K) scales
Can thermometers measure the heat of a substance?
NO
What are the ways that heat is transferred?
Conduction, convection and radiation
Explain conduction transfer, please
Conduction is the transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more.
