List the factors affecting the amount of heat produced in an element

.The resistance, R of the conductor. A higher resistance produces more heat.The time, t for which current flows.

.The longer the time the larger the amount of heat produced

.The amount of current,

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

measure their densities same density, same sub