Question

Which of the following statements best describes the energy transformation that occurs when a log burns? Mechanical energy changes to heat and light energy. Chemical energy changes to heat and light energy. Heat and light energy changes to chemical energy. Mechanical energy changes to chemical energy.

Answer 1

Answer: Chemical energy changes to light and heat energy.

Explanation:

The energy that is found in the wooden log is the chemical energy which is found in the bonds of carbon.

When the wooden log is burnt, the bonds are broken and the energy is converted in the form of light and heat. This is the conversion of chemical energy into heat energy and light energy.

This is also known as combustion in which a hydrocarbon is burnt to produce light and heat and carbon dioxide is released during the process.

Answer 2

The fire rearranges the molecules of a log while it is burning making it a chemical change.
Your answer is C