first select the main topic of health related to the model then meaning ,process,conclusion etc.
its easy to make volxano with cament biii
Look up and learn everything about green energy then create a model representing what happens to green energy.
Paper milk carton (1/2 gallon) Water Nail Ruler Masking tape Marker Scissors Paper Pen Prepare an area for the experiment--over a sink, in a tub, or on a water table. Gather all your materials...