Post on 03-Jan-2016
• Heat is the energy transferred from a hotter object to a colder object. – The hotter something is, the faster its molecules
are moving.– Does ice have heat?
Heat
• Using an arrow, predict the location of the flame where I would be able to light the match without touching the flame its self.– Top– Middle– Bottom
• Observe this last demo and think about why this happened.
Candle Demo
• At stations 2 and 3 you must wear safety goggles.
• You are working with hot objects, please keep your hands and other flammable materials away from the candle and hot plate.
Safety
• Each station is numbered (1, 2, or 3). You will begin at the station where you are currently sitting. You will have 4 minutes at each station to draw a picture, and record written observations for each example of heat transfer.
• At the end of 4 minutes, you will hear the song, I Like to Move It, move to the next station.– Ex. If your at station 2, move to station 3 next,
and finally to station 1
Heat Transfer Stations
• Open your book to page 115.
– Read about the three types of heat transfer.– Decide which station represented each type of
heat transfer and copy the notes and examples.
ClimateNext Step
• The transfer of energy over long distances of space.
• Moves in waves.• No direct contact– Sunlight– Open fire
ClimateRadiation
• Heat transfer by direct contact of particles of matter.
• Particles bump into each other and transfer their energy heating them up.– Putting your hand on a hot stove.
Conduction
• Heat transfer by the circular movement of a fluid (liquids and gasses).
• Particles flow transferring heat energy.• Caused by differences in density.
Convection
• Density: the amount of mass in a given volume. D=M/V
• Heated Fluids:– Move faster and bump into other particles.– They spread out increasing the volume.– Density decreases
• Cooling Fluids– Move slower– They come together decreasing the volume.– Density increases
How Convection Works