the technique of calorymetry is used to determine the energy content of food items.
B. The amount of waste would build up and the toxins produced would harm the animals and humans
A scientist would use, C. Weather Balloon.
Heat creates energy... the atoms move faster and faster, which changes the state of matter.
for example:
if a solid is heated, it turns to a liquid
if a liquid is heated, it turns to a gas
hope this helps?
Ok... so pretty much you need to use the words they gave you and find the relation between them and connect them using the chart given in the textbook. I tried explaining my best. hope I helped