Question

An astronaut on the moon takes out a paper and uses a magnifying lens to focus sunlight on the paper. The paper does not catch fire. What can be reason for this occurence?

• A. Absence of wind
• B. Absence of sunlight
• C. Absence of oxygen
• D. Absence of carbon dioxide

Answer 1

The correct option is C Absence of oxygen

For a fire to occur, all the factors that support combustion are required. Factors that support combustion are:
- Presence of a combustible substance
- Supply of oxygen
- High ignition temperature
In the absence of any of these, fire will not take place. Since moon has no oxygen supply, the paper will not catch fire.