8 Convection The transfer of heat by the movement of a liquid or gas Hot air rises, cold air sinksA hot air balloonLava lampsThe wind is caused by convection currents
9 Explaining Convection Convection currents cause the cooler breezes you experience by a large body of water.These currents also cause the movement of magma within the earth.
10 Examples of Convection: Have you ever noticed that the air near the ceiling is warmer than the air near the floor? Or that water in a pool is cooler at the deep end?Examples: air movement in a home, pot of heating water.Pick one of these examples and draw the circular pattern in your notes.When the water at the bottom of a pot is heated, its particles move faster, and they also move farther apart. As a result, the heated water becomes less dense. A less dense fluid will float on top of a more dense one. Therefore, the heated water rises in the pot. The surrounding cooler water flows into its place.This flow creates the circular motion as seen on the next page, which is known as convection currents.
14 Heat Transfer Conduction, Convection and Radiation
15 Which type of heat transfer? Sitting by a warm fireA room warmed by a radiatorFrying a piece of fishA spoon sitting in a cup of hot coffeeA heating lampIroning a shirt
16 Which type of heat transfer? Sitting by a warm fire radiationA room warmed by a radiator convectionFrying a piece of fish conductionA spoon sitting in a cup of hot coffee conductionA heating lamp radiationIroning a shirt conduction
17 What are Insulators?Insulators are materials that do not allow heat to move easily through them.
18 What are Conductors?Conductors are materials that allow heat to move easily through them.
19 Create a T chart Insulators Conductors Research 5 examples of good insulators and conductors and include a picture for each.
20 Reflect on the many uses we have for insulators and conductors in our everyday life. Write a 1 paragraph reflection