P1 Revision Flashcards
What does the kinetic particle theory explain?
Solids, liquids, and gases
When a solid is heated, does it vibrate faster or slower about their fixed points?
It vibrates faster.
What is evaporation increased by?
Higher temperatures
How are the particles arranged in a solid?
Close together, regular pattern, and they vibrate on the spot
Particles in both liquids and gases (collectively called fluids) move randomly. What is this called?
Brownian motion
Heat is thermal energy. It can be transferred from one place to another by __________
Heat is thermal energy. It can be transferred from one place to another by conduction.
Metals are good conductors of heat, but non-metals and gases are usually poor conductors. What are poor conductors called?
Insulators
Conduction, convection and _________
Conduction, convection, and radiation
Liquids and gases ______ when they are heated
Liquids and gases expand when they are heated.
Where is heat energy conducted from?
Heat energy is conducted from the hot end of an object to the cold end.
What is conduction?
Conduction is when heat or electricity can be transferred through the material of a substance when there is a difference of temperature or of electrical potential.
What is convection?
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy.
What is radiation?
the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
Name some suggestions to reduce heat loss.
- Fit carpets, curtains, and draft excluders, or maybe even foil reflectors in/on the walls. 2. Use double-glazing windows. 3. Use cavity wall insulation. 4. Lay loft insulation in the roof
In houses or buildings, where is heat lost?
Heat is lost through roofs, windows, walls, floors, and through small gaps around doors and windows.
