- Investigating a process requires investigating every stage of the process
- Scientists want to investigate the water cycle
- A cycle is a kind of process
- So, scientists have to investigate every stage of the water cycle

- Scientists have to investigate every stage of the water cycle
- Precipitation is a stage in the water cycle process
- Therefore, scientists have to investigate precipitation in the water cycle

- Scientists have to investigate precipitation in the water cycle
- Investigating something requires investigating the properties of something
- Therefore, scientists have to investigate the properties of percipitation

- Scientists have to investigate the properties of percipitation
- The amount of precipitation is a property of precipitation
- Investigating sometimes requires measuring
- Hence, scientists have to meausre the amount of precipitation

Therefore, scientists have to meausre the amount of precipitation
What would most likely be measure during an investigation of the water cycle?
- The amount of precipitation is a property of precipitation 
- Investigating sometimes requires measuring 
- Investigating a process requires investigating every stage of the process 
- Scientists want to investigate the water cycle 
- A cycle is a kind of process 
- Precipitation is a stage in the water cycle process 
- Investigating something requires investigating the properties of something