Explain how fire starts and what the components of fire are. Apply this to a scenario with wood shavings and a soldering iron.

Here's the solution to question 1:

1. Meaning of fire: Fire is a rapid chemical reaction, specifically a combustion process, that involves the oxidation of a fuel source, releasing energy in the form of heat and light. It requires three components: fuel, oxygen, and heat (known as the fire triangle).

   How fire may start in such a situation:
   In this scenario, the wood shavings act as the fuel. The switched-on soldering iron provides the necessary heat source. When the hot soldering iron is left near the wood shavings, it transfers heat to them. If the temperature of the wood shavings reaches their ignition temperature and there is sufficient oxygen in the air, the wood shavings will ignite and start burning, leading to a fire.