PHYSICS PROJECT (:

Convection videos
Video 1: Convection in clouds

As seen in the video, the lower part of the clouds rose up and pushed the upper part of the clouds down.

The Sun heats up the ground and the air will be heated up and a parcel of warm air forms. Once the warm air gets hot enough, it becomes less dense and rise quickly upwards in the atmosphere. When air rises upwards, it will cool due to the decrease in pressure and the change of density. This forms the convection current.

Something interesting
If the air cools enough, some of the water in the air will start to change from gas phase to a liquids phase. They will form as tiny droplets of water and form a convective cloud!


This shows how convection rain is formed! [due to convection currents]

Video 2: Convection currents in liquid

The cooler dyed water is denser than the surrounding water sinks as the ice melts and the warmer water, which is less dense, starts to rise. This sets up the convection current.

Video 3: Convection currents in liquid 2

As heat source is placed at the right arm, water in the right arm becomes warmer and less dense, and starts to rise. The warm water rising up the arm pushes the cooler water, which is denser, and cause it to sink down the left arm. The dyed cooler water is pushed down towards the heat source by the warm water and eventually will become less dense and rise up the right arm after being heated. A convection current is set up.