1.Convection currents do not take place in a vacuum. The reason for this is the majority of the heat loss or gain via convection.

2. convection can only take place in a gas or a liquid.

3. It is more effective in a liquid because there are more particulars that can be heated.

Kinetic energy: energy that is made use friction

Particles: a minute portion of matter.

Vibration: an instance of vibrating.

Dense: closely compacted in substance.

Convection current: a current in a fluid that results from convection.