PRACTICE Examples of Conduction, Convection, and Radiation
A pot sitting on a hot burner.
How the inside of a greenhouse works.
Touching a metal spoon that is sitting in a pot of boiling water
Using a heating blanket to get warm
A person placing their cold hands over a warm fire
A person placing their hand over a hot burner
Lying out in the sun to get a tan
Putting your wet shoes on a floor vent to dry them faster
Picking up a hot cup of coffee
Macaroni rising and falling in a pot of boiling water
produced by the total energy of the particles that make up an object
all atoms have thermal heat energy because the atoms or molecules that make matter are in constant motion
average motion of the atoms and molecules that we sense
the energy that flows due to temperature differences;always transferred from warmer to cooler substances
conduction, convection, radiation
ways to heat the atmosphere
transfer of energy through matter using direct contact
energy is transferred by direct contact
heat transfer by the movement of mass from one place to another;can take place only in liquids and gases
moves about the planet heat gained by conduction and radiation from the sun;heating of the Earth isn't even
only way heat is transferred that can move through the relative emptiness of space
conduction and convection
require motion of molecules like air or water to move heat
the transfer of heat by the actual movement of warmed energy in a gas or liquid by movement of currents. (It can also happen in some solids, like sand)
electromagnetic waves that directly transport energy through space;sunlight is a form of this that brings heat to our planet without the aid of anything
energy is transferred by the mass motion of molecules
energy is transferred by electromagnetic radiation
the transfer of heat within a substance by direct contact
transfer of heat by physical movement of the heated substance itself (vertical movement)
transfer of heat from the Sun to the Earth's atmosphere
transfer of heat from the Earth's surface to the Earth's atmosphere
causes some of the Earth's heat to be lost back into space
main driving force for the transfer of heat between air masses
Clouds reflect the sun's heat away from the Earth, thus it makes the day cooler
created by the Earth from some of the heat from the sun
clouds form a blanket which keeps the heat from escaping back into the atmosphere. The heat stays in keeping us warmer.
heat from the Earth is able to escape back into the atmosphere;cooler nights
no clouds to reflect the sun's heat away from the Earth; day is warmer
heat transfer through contact
why do different metals conduct heat different rates
different materials have different conductivites
most conductive to least conductive metal
Copper, Aluminum, Brass, Steel
Heat energy can be transfered in three ways
Conduction, Convection, Radiation
Conduction occurs between objects in
transfer of energy as heat through a material
Conduction takes place when objects are in direct contact are
Convection results from the movement of
movement of matter due to differences in density that are caused by temp. variations can result in transfer of energy as heat
Radiation does not require
energy that is transferred as electromagnetic waves, such as visible light and infrared waves
material which energy can be easily transferred as heat
Material thats a good conductor
material that transfers energy poorly
Material thats good insulator
Energy transferred through partical collisions
Why are gases poor conductors
Their particals are so far apart
What makes a substance a good or poor conductor depends in part on
how much energy is required to change the temperature of the substance by certain amount
Specific heat is a characteristic
Specific heat of any substance is the amount of energy required to raise the temperature of
1 kg of that substance by 1K
Which substance shown has the highest specific heat
Matter expanding when its temperature is raised.
Preventing heat from flowing in or out of a material.
Transfer of energy by the flow of a liquid or a gas.
Molecules of energy travel through a solid.
Energy stored in an object or material.
The changing of a solid (ice cube) to a liquid (water).
The energy of a moving object.
The changing of a liquid to a gas.
The changing of a gas to a liquid.
The vaporization of molecules from the surface of a liquid.
The transfer of energy by electromagnetic waves.
The changing of a liquid (water) to a solid (ice cube).
Bubbles of vapor escape from a liquid as a result of heating.
What are the 2 forms of energy?
What are the three main types of heat transfer?
Conduction, convection, radiation
Energy is passed from atom to atom through direct contact
Method of heat transfer of thermal energy by fluid circulation of the movement of atoms
Transfer of heat through electromagnetic radiations
Name two examples of conduction
Your hand touching a hot dish, You burn your hand
Name two examples of convection
a heater, boiling water
Name two examples of radiation
the sun on your skin, warmth of the fire