When Anna eats an apple, the sugars in that apple are broken down into the substance called glucose. Glucose is then burned in her body for energy. One of the body parts that needs this energy is the heart, which beats due to electrical impulses. A byproduct of this glucose breakdown is the heat that warms her body and is later released.
Answer
A
Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
B
Chemical energy is converted to thermal energy and electrical energy.
C
Electrical energy is converted to chemical energy and thermal energy.
D
Mechanical energy is converted to potential energy which is then converted to kinetic energy.
Explanation
The sugars in the apple store chemical energy. As glucose is broken down, some of that energy becomes thermal energy (body heat), and energy also supports the electrical impulses that make the heart beat. Therefore, the best choice is “Chemical energy is converted to thermal energy and electrical energy.”
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