heat
DESCRIPTION
Science 9- Chapter 6TRANSCRIPT
![Page 1: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/1.jpg)
Heat
![Page 2: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/2.jpg)
Heat• A form of energy• The motion of particles in matter• Flows from warmer objects to cooler ones
![Page 3: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/3.jpg)
Did you Know
![Page 4: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/4.jpg)
HEAT CAN DO WORK
![Page 5: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/5.jpg)
Steam Engines
Automobiles
Solar Energy
A Toaster
![Page 6: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/6.jpg)
Rubbing your hands together produces heat.
What produces heat energy?
![Page 7: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/7.jpg)
Nuclear reactionsIn the sun
The earth’s most important heat source
![Page 8: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/8.jpg)
(The energy of motion)
-Rubbing your hands together
-Striking a match
Mechanical Energy
![Page 9: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/9.jpg)
Sometimes heat is released when substances react chemically with each other.
Chemical Energy
![Page 10: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/10.jpg)
Electricity
What other appliances can you name that change electricity into heat energy?
![Page 11: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/11.jpg)
Temperature
A measure of how fast an object’s particles are moving.
![Page 12: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/12.jpg)
Touching an object is not the safest or most accurate way to measure its temperature.
![Page 13: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/13.jpg)
Use a thermometer to measure temperature accurately.
![Page 14: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/14.jpg)
Freezing point- The temperature at which a liquid changes to a solid.
Water= 0 degrees Celsius32 degrees Fahrenheit
![Page 15: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/15.jpg)
Melting Point- The temperature at which a solid changes into a liquid.
Same as freezing point, but used when an object is being heated.
![Page 16: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/16.jpg)
Boiling point- Temperature at which a substance changes from a liquid to a gas.
Water= 100 degrees Celsius
212 degrees Fahrenheit
![Page 17: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/17.jpg)
Every substance has its ownFreezing and boiling points
![Page 18: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/18.jpg)
How does heatTravel?
![Page 19: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/19.jpg)
RadiationThe movement of energy through space.
![Page 20: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/20.jpg)
Conduction- The movement of heat energy from one molecule to the next.
![Page 21: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/21.jpg)
Convection- Flow of energy that occurs when a warm liquid or gas rises.
Heat makes things rise!
![Page 22: Heat](https://reader035.vdocuments.us/reader035/viewer/2022070303/5498f5e8b47959774d8b4655/html5/thumbnails/22.jpg)