Energy+transfer

IGCSE Physics > Energy resources and energy transfer =Energy Transfer= 4.2 describe energy transfers involving the following forms of energy: thermal (heat), light, electrical, sound, kinetic, chemical, nuclear and potential (elastic and gravitational) media type="custom" key="15460804" ACTIVITY: The brainpop movie about types of energy names several. What are they? TYPES OF ENERGY FOR IGCSE
 * VIDEO WITH SOME NICE EXPLOSIONS (STARTS AUTOMATICALLY) **

ACTIVITY: Observe the various activities in class, identify the changes occurring and draw a Sankey diagram for each. [|IGCSE Energy transfers activity.doc]

[|IGCSE Energy transfers activity.doc]

[|LINERIDER GAME WITH ENERGY IMPLICATIONS] [|ENERGY SKATE PARK] Click on the link or download from Studywiz (faster!). ACTIVITY: USING THE BASIC TRACK, INVESTIGATE THE ENERGY CHANGES WITHOUT FRICTION AND WITH FRICTION.

FORMS OF ENERGY: Energy is transferred from one form to another whenever any change happens. forms of energy include chemical, nuclear, light, sound, magnetic, thermal, electrical, kinetic and potential. Measured in joules.

4.3 understand that energy is conserved

CONSERVATION OF ENERGY Energy is never created nor destroyed, it just transfers from one form to another.

4.4 recall and use the relationship

EFFICIENCY: A measure of the fraction of useful work a machine does.

4.5 describe a variety of everyday and scientific devices and situations, explaining the fate of the input energy in terms of the above relationship, including their representation by Sankey diagrams

AC TIVITY: Create and complete a spreadsheet: Energy conversion and efficiency.xls using information from eChalk. You can use the information to calculate the efficiency of the machines. [|ENERGY EFFICIENCY SIMULATION] your teacher will give you the school's login details [|Energy and efficiency table.xls] - this is the spreadsheet





media type="custom" key="8426240" 4.6 recall that energy transfer may take place by conduction, convection and radiation
 * ELECTRIC CAR VIDEO by They Might be Giants from 'Here Comes Science' album**

4.7 describe the role of convection in everyday phenomena

4.8 describe how insulation is used to reduce energy transfers from buildings and the human body

THERMAL ENERGY TRANSFER: Thermal energy can be transferred by conduction, convection and radiation.

CONDUCTION: Occurs chiefly in solids, by interaction between the particles which transfers thermal energy.

CONVECTION: Occurs in fluids (liquids and gases), warm fluid expands and rises and is replaced by denser cooler fluid which sinks.

[|IS THERE CONVECTION WITHOUT GRAVITY?] - link to European Space Agency. Think about it before you click through.

[|LINK TO FOUR SHORT FILMS ABOUT THERMAL RADIATION] NIGHT VISION DEVICE media type="custom" key="9347396" RADIATION: Does not require a medium. Energy is transferred by electromagnetic radiation traveling at the speed of light. THERMAL INSULATION: Materials which slow down the transfer of thermal energy.