NASA pages discussing the USML Experiment.

http://zeta.lerc.nasa.gov/expr/candle2.htm

The burning of a candle relies on thermal convection to carry away waste gas and draw in fresh oxygen. Convection is possible due to the differing densities of gases at different temperatures in a gravitational field. Hence, the study of candle flams in microgravity (near-zero gravity) is an area of rich and unusual phenomena.

The Virtual Laboratory (G. Bothun), University of Oregon, Eugene, OR.

http://zebu.uoregon.edu/nsf/planck.html

Select a temperature between 3000 and 10,000 degrees, and see the Planck spectrum for that temperature plotted. Stars have a radiation pattern which is governed largely by this formula. The user can perform photometry on that curve by selecting either a blue, green, or red filter.

from Science Lab at Kangwon National University in South Korea.

http://www.kangwon.ac.kr
/~sericc/sci_lab/physics
/conduction/convection.html

This applet is written in Korean and English so some parts don't translate. The bottom slider controls the position of the heat source. You can turn the heat off and on by clicking in the box. As the particles heat up, they change color from blue to red.

from Science Lab at Kangwon National University in South Korea.

http://www.kangwon.ac.kr
/~sericc/sci_lab/physics
/conduction/conduction.html

This applet is written in Korean and English so some parts don' t translate. The applet on the left shows the conduction in a solid bar and the applet on the right shows convection in a gas. Above the bar is a graph showing the temperature at each point on the bar. Note you can start, stop and pause. You can turn off the heat applied to the end of the bar.

from Science Lab at Kangwon National University in South Korea.

http://www.science.or.kr
/lee/physics/conduction_convection
/conduction_convection.html

This applet is written in Korean and English so some parts don't translate. The applet on the left shows the conduction from a solid block to a solid block and the applet on the right shows convection in a gas. The red solid block is at a hot temperature and the blue solid block is at a cold temperature. You can bring the two blocks into contact by pressing the control with ?|| and reset by using the ? control. Below the bars is a graph showing the temperature at each point on the bars.