Because molecules expand as objects get hotter. Hot air is also less dense which causes the cool air to sink and the warm air to rise. This is what causes winds.
Conclusion Questions:
1. Conduction is the transfer of heat between two substances with direct contact. This was simulated by the match and the teabag.
2. Convection is the transfer of heat through liquids or gases. This was simulated because when we lit the air filled cylinder on fire, this heated up the air. This made the air less dense and the colder, more dense, air came down and pushed up the warm air around it.
3. The cold air is denser therefore it sinked down and pushed the warm air up. The cold, more dense air sinks down and the warm, less dense air gets pushed up
4. The conduction from the stove heats up the bottom of the soup. The warmer soup rises and the colder, more dense air sinks and heats up that air.
5. You should army crawl because the hotter air would rise to the upper level of the room. This would leave you with colder air and increase your chances of surviving the fire.
Conclusion Questions:
1. Conduction is the transfer of heat between two substances with direct contact. This was simulated by the match and the teabag.
2. Convection is the transfer of heat through liquids or gases. This was simulated because when we lit the air filled cylinder on fire, this heated up the air. This made the air less dense and the colder, more dense, air came down and pushed up the warm air around it.
3. The cold air is denser therefore it sinked down and pushed the warm air up. The cold, more dense air sinks down and the warm, less dense air gets pushed up
4. The conduction from the stove heats up the bottom of the soup. The warmer soup rises and the colder, more dense air sinks and heats up that air.
5. You should army crawl because the hotter air would rise to the upper level of the room. This would leave you with colder air and increase your chances of surviving the fire.