- Water is in the solid state , called ice
- Ice cube is made of ice
- Therefore, ice cube is made of water in solid state

- Ice cube is made of water in solid state
- Water is a kind of liquid at room temperature
- So, ice cubes have to be made by changing liquid water to solid ice

- Water is a kind of substance
- Freezing means a substance changes from a liquid into a solid by decreasing heat energy
- Therefore, water freezing means water changes from a liquid into a solid by decreasing heat energy

- Ice cubes have to be made by changing liquid water to solid ice
- Water freezing means water changes from a liquid into a solid by decreasing heat energy
- Hence, ice cubes have to be made by freezing the liquid water

- Ice cubes have to be made by freezing the liquid water
- Freezing is a kind of exothermic process
- So, making ice cubes is a kind of exothermic process

Hence, making ice cubes is a kind of exothermic process
Q: Which action is an example of an exothermic process?
Context:
- Water is a kind of substance 
- Water is in the solid state , called ice 
- Ice cube is made of ice 
- Freezing means a substance changes from a liquid into a solid by decreasing heat energy 
- Water is a kind of liquid at room temperature 
- Freezing is a kind of exothermic process