Conduction, Convection, and Radiation Flashcards
Define “heat”.
A type of energy that makes things feel warm.
Define “temperature”.
A measurement of how much heat energy something has.
Define “conduction”.
The transfer of heat through an object/from one object to another object.
How does conduction occur?
When one part of an object is heated, the particles in that area gain energy and begin to move faster. They bump into particles next to them, causing those particles to also move faster. This continues until all the particles are moving at the same speed. The heat is transferred through the particles to heat up the object.
Define “insulator”.
A material that doesn’t transfer heat by conduction.
Define “convection”.
The transfer of heat through liquids or gases.
How does convection occur?
Use a pan on a stove as an example.
The water at the bottom of the pan gets hot first. As water heats up, the particles of water move faster and further apart. This makes the water expand and rise. The hot water then spreads out and as it cools, it contracts, causing it to sink down the sides of the pan to the bottom again. The process repeats until all of the water is the same temperature.
These movements are called convection currents.
Define “convection current”.
Current of hot air/liquid caused by heat rising.
Define “radiation”.
The transfer of heat through an empty space.
How does radiation occur?
It is transferred from the Sun through waves.
White ________ the sun’s radiation.
Black ________ the sun’s radiation.
- Reflects.
2. Absorbs.
