Heat CH 4 Prentice Hall p CH 4 Prentice Hall p Transfer

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

Three ways heat is transferred- – Convection – Conduction – Radiation Heat Transfer

Write down your observations of the spiral demonstration. What is happening and why? Spiral Demo

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

Remaining Time:

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. Climate Next Step

The transfer of energy over long distances of space. Moves in waves. No direct contact – Sunlight – Open fire Climate Radiation

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

Convection Lab

Convection and Sea

The Ocean Floor