5-6 What is convection?
SWBAT: Describe how heat travels through gases and liquids.
convection: transfer of heat in gases and liquids
convection current: movement of gases or liquids caused by differences in density
• The transfer of heat in gases and liquids is called convection.
• Convection currents are movements of gases or liquids caused by differences in density.
• Convection currents can transfer heat.
• Convection currents cause the movement of air above Earth’s surface and the movement of large sections of Earth’s crust.
• Heat transfer by convection currents is used in some heating systems.
1. Define: What is convection?
2. Explain: How do convection currents transfer heat in liquids?
3. Identify: What method of heat transfer is used in a hot-water heating system?
Checking Concepts
1. Heat travels through gases by __________________.
2. Warm air is __________________ dense than cold air.
3. Warm water rises and cool water __________________.
4. Convection takes place in gases and __________________.
Thinking Critically
5. Analyze: To cool a room, should an air conditioner be placed at the bottom of a wall or at the top of a wall? Explain your answer.
6. Infer: Is heat transferred through solids by convection? Explain.
convection: transfer of heat in gases and liquids
convection current: movement of gases or liquids caused by differences in density
• The transfer of heat in gases and liquids is called convection.
• Convection currents are movements of gases or liquids caused by differences in density.
• Convection currents can transfer heat.
• Convection currents cause the movement of air above Earth’s surface and the movement of large sections of Earth’s crust.
• Heat transfer by convection currents is used in some heating systems.
1. Define: What is convection?
2. Explain: How do convection currents transfer heat in liquids?
3. Identify: What method of heat transfer is used in a hot-water heating system?
Checking Concepts
1. Heat travels through gases by __________________.
2. Warm air is __________________ dense than cold air.
3. Warm water rises and cool water __________________.
4. Convection takes place in gases and __________________.
Thinking Critically
5. Analyze: To cool a room, should an air conditioner be placed at the bottom of a wall or at the top of a wall? Explain your answer.
6. Infer: Is heat transferred through solids by convection? Explain.