1. Chapter 12 Using Energy

2. Lesson 1 Heat
Heat- the total amount of thermal energy an object releases
Temperature- the measurement of the average energy of molecules 1

3. 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

4. Lesson 2 Sound
Sound wave – series of rarefactions & compressions through a substance

5. 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

6. 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

7. Prism – a way to separate light
Electromagnetism – the way electric & magnetic forces interact 3

8. Lesson 4 Electricity
Electricity – the movement of electrons

9. Circuit – formed when an electric current passes through an unbroken path of conductors4

10. 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