Question

After removal from the acid, the cubes were cut and the depth of the colour change was measured. The acid had diffused to a depth of 3mm in each cube. The results of the experiment are shown below.

(b) With reference to the data, describe the rate of diffusion into each cube.


(c) Write a suitable conclusion for this experiment

Answer 1

Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.