The Particle Model Flashcards
What is heat?
Heat is a form of energy that is transferred through solids, liquids and gases.
Particles in a solid:
In a solid, the particles are tightly packed together. They keep the shape of the substance by vibrating on the spot.
Particles in a liquid:
In a liquid, the particles are closely packed together, but they are free to slide over each other. They also vibrate.
Particles in a gas:
In a gas, the particles are free to move and are not bound together. The particles in a gas move in straight lines until they collide with another particle.
What happens when a substance is heated?
When a substance is heated, energy is added to its particles
What is the energy stored as when a substance is heated?
Some of the energy is stored as potential energy. The remaining energy increases the kinetic energy of the particles in a material.
What happens when sufficient energy is added to a solid or liquid?
The substance changes shape because the particles have broken away from each other.
What is temperature?
The temperature of a substance is the measure of kinetic energy stored within the particles.
What is temperature measured with?
A thermometer
Do particles of warmer substances move faster than particles of cooler substances? Explain.
Particles of warmer substances do move faster than particles of cooler substances. For example, boiling water moves quickly and ice is frozen solid.
What is the temperature of absolute zero?
-273 Degrees Celsius
Where does heat flow?
From areas of higher temperatures to areas of lower temperatures.
What are the three forms that heat transfer can happen in?
Conduction, convection and radiation.
