Chapter 12 Using Energy. Lesson 1 Heat Heat- the total amount of thermal energy an object releases Temperature- the measurement of the average energy.
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Chapter 12Using Energy
Lesson 1 Heat
• Heat- the total amount of thermal energy an object releases
• Temperature- the measurement of the average energy of molecules
1
How does heat travel?
• Conduction – passing of heat through a material while the material stays in place
• Convection – flow of thermal energy through a liquid or gas, hot rises and cool sinks
• Radiation – transfer of energy through electromagnetic rays
1
Lesson 2 Sound
• Sound wave – series of rarefactions & compressions through a substance
• Medium – substance through which the wave travels
*Sound tends to travel with the greatest speed through solids and slowest through gases
• Frequency - number of times an object vibrates per second
2
Lesson 3 Light
• Photon – tiny bundle of energy by which light travels
• Translucent – objects that blur light as it passes through
• Image – a “picture” of the light source that light makes bouncing off shiny surfaces
Prism – a way to separate light
• Electromagnetism – the way electric & magnetic forces interact
3
Lesson 4 Electricity
• Electricity – the movement of electrons
• Circuit – formed when an electric current passes through an unbroken path of conductors
4
Lesson 5 Magnetism
• Magnetism – the ability of an object to puch or pull on another object that has the magnetic property
• Magnetic field – a region of magnetic force around a magnet, represented by lines
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