Question

Which of the following is a source of chemical energy commonly used by humans?

Select one:
a. turning on a light switch
b. a bicycle
c. water flowing in a river
d. a sandwich

The answer is not A, please help!

Answer 1

Answer:

The correct answer will be

(D). A Sandwich

Explanation:

Checking all options -

• Turning on the lighting switch is an example of converting electrical energy into light or thermal energy. We also use the chemical energy in our body to turn on the light (press the switch).
• Bicycles are an example of using the chemical energy stored in our body to convert it into mechanical energy.
• Water flowing through a river is an example of (hydroelectric power generation). It is used for power generation, also known as hydropower.
• Sandwiches are an example of a  chemical energy source. This is stored in our body and used for various purposes.

As we can see only a sandwich is a source of chemical energy in the given options.

#SPJ3