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© Boardworks Ltd 20091 of 10
© Boardworks Ltd 20092 of 10 How are the particles arranged in a solid, a liquid and a gas? What is conduction? solid liquid gas Particles that are very close together can transfer heat energy as they vibrate. This type of heat transfer is called conduction. What type of solids are the best conductors? Conduction is the method of heat transfer in solids but not liquids and gases. Why?
© Boardworks Ltd 20093 of 10 How do nonmetals conduct heat?
© Boardworks Ltd 20094 of 10 Metals are good conductors of heat. The outer electrons of metal atoms are not attached to any particular atom. They are free to move between the atoms. When a metal is heated, the free electrons gain kinetic energy. How do metals conduct heat? heat This means that the free electrons move faster and transfer the energy through the metal. This makes heat transfer in metals very efficient. Insulators do not have free electrons and so they do not conduct heat as well as metals.
© Boardworks Ltd 20095 of 10 What happens a fluid is heated? Liquids and gases can both flow and behave in similar ways, so they are called fluids. heat less dense fluid The heated fluid particles gain energy, so they move about more and spread out. The same number of particles now take up more space, so the fluid has become less dense. What happens to the particles in a fluid when it is heated?
© Boardworks Ltd 20096 of 10 What is convection? Warmer regions of a fluid are less dense than cooler regions of the same fluid. called a convection current. The warmer regions will rise because they are less dense. The cooler regions will sink since they are more dense. This is how heat transfer takes place in fluids. It is called convection. The steady flow between the warm and cool sections of a fluid, such as air or water, is
© Boardworks Ltd 20097 of 10 How does convection in a liquid occur?
© Boardworks Ltd 20098 of 10 How does convection in a gas occur?
© Boardworks Ltd 20099 of 10 Why is the freezer compartment at the top of a fridge? The freezer compartment is at the top of a fridge because cool air sinks. This warmer air rises and so a convection current is set up inside the fridge, which helps to keep the fridge cool. Why is convection important in fridges? The freezer cools the air at the top and this cold air cools the food on the way down. It is warmer at the bottom of the fridge.
© Boardworks Ltd 200910 of 10 Conduction and convection – summary
© Boardworks Ltd of 32 Heat energy only flows when there is a temperature difference from a warmer area to a cooler area. Why does heat transfer.
© Boardworks Ltd of 6. © Boardworks Ltd of 6 What happens a fluid is heated? Liquids and gases can both flow and behave in similar ways, so.
Heat transfer. Why does heat transfer happen? Heat is a type of energy called thermal energy. Heat can be transferred (moved) by three main processes:
© Boardworks Ltd of 32. © Boardworks Ltd of 32.
How can heat be transferred?. Objectives Describe conduction as a method of heat transfer. Outcomes C: Define conduction. B: Explain conduction in terms.
Q What does this picture show and who is in the best position?
© Boardworks Ltd of 31 KS4 Physics Heat Transfer.
© Boardworks Ltd of 11 Types of Energy Unit 2: Energy and Our Universe.
What is Heat? This is the movement of thermal energy from a substance at a higher temperature to another at a lower temperature.
UNDERSTANDING HEAT TRANSFER: CONDUCTION, CONVECTION AND RADIATION.
Title: Heat energy Learning objective: 1.How does heat energy travel through a solid? 2.What is an insulator? Starter: What is the other name for heat.
P1a 1.4 Convection. Lesson Objectives To give examples of where convection currents occur. To describe the process of convection in terms of particle.
Understanding Heat Transfer: Conduction, Convection and Radiation.
Understanding Heat Transfer, Conduction, Convection and Radiation.
Understanding Heat Transfer: Conduction, Convection and Radiation Adapted from Jefferson Lab by Mrs. Andris.
What do we all have in common?. What is the opposite of a conductor? Name a poor conductor of heat? What makes bubble wrap a bad conductor and a good.
Understanding Heat Transfer,. Heat Transfer Heat always moves from a warmer place to a cooler place. Hot objects in a cooler room will cool to room temperature.
Heat Transfer Radiation Conduction Conduction Convection Convection.
Moving Thermal Energy. CONDUCTION ► Is the transfer of energy through matter by direct contact of particles.
Section 3: Transferring Thermal Energy Chapter 9: Heat and States of Matter.
Section 2: Transferring Thermal Energy Chapter 6: Thermal Energy.
Heat energy flows from warmer to cooler areas Lesson 1.3 You will learn: How heat is transferred in matter; How the process of conduction transfers heat;
Understanding Heat Transfer, Conduction, Convection and Radiation 6.P.3.1 Illustrate the transfer of heat energy from warmer objects to cooler ones using.
Heat Transfer What is a heat? Heat always flows away from a hot material to a cold material Remember, heat moves in predictable ways, from a high temperature.
Heat Transfer Conduction, Convection, Radiation. Conduction Heat energy can be transferred from one substance to another when they are in direct contact.
© Boardworks Ltd 2003 KS4 Energy - Heat Transfer.
What is happening to the heat from the core?. 1. What are the 3 ways that heat is transferred? a. Radiation b. Conduction c. Convection.
THERMAL ENERGY CHAPTER 5. TEMPERATURE All matter is made of small particles which are in constant motion. Because the particles are moving, they have.
If you put a hot cup of coffee into a refrigerator, would “cold” transfer from the fridge to the coffee, or would “hot” transfer from the coffee to.
By Ollie Docherty and Lauren Moore. Heat energy can move through a substance by conduction. Metals are good conductors of heat, but non-metals and gases.
Welcome Back Scientists! Wednesday, January 27, 2016 Objective: Thermal Energy; I will discuss thermal energy and compare the different ways to transfer.
A Form of energy that is related to the K.E. of molecules. The motion of molecules produces heat. The more motion, the more heat is generated.
Thermal Energy and Heat. Temperature The measure of how HOT or COLD and object is.
How is Energy Transferred?. Radiation animations of heat transfer Emission and transfer of energy by means of electromagnetic waves Method of heat transfer.
Question If a cup of coffee and an ice cream cone were left on the table in this room what would happen to them? Why? The cup of coffee will cool until.
© Boardworks Ltd 2003 KS4 Heat transfer. © Boardworks Ltd 2003 A slide contains teacher’s notes wherever this icon is displayed - To access these notes.
P1a 1.3 Conduction. Lesson Objectives To state that metals are good conductors of thermal energy. To list poor conductors or insulators. To explain why.
Transfer of Energy. How heat (energy) moves. What does “Transfer of Energy” mean?
3 Types of Heat Transfer. Heat Transfer- The movement of heat from a warmer object to a cooler object. The movement of heat from a warmer object to a.
Understanding Heat Transfer, Conduction, Convection and Radiation Chapter 9.
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