- Water is a kind of substance
- The molecules of a substance cannot move easily past each other in solid state
- So, the molecules of water cannot move easily past each other in solid state

- The molecules of water cannot move easily past each other in solid state
- Water changes into a phase where the molecules cannot move easily past each other
- Hence, water changes into solid state

- Water changes into solid state
- A phase change is when a substance changes from one state of matter into another state of matter
- Solid is a kind of state of matter
- Therefore, water undergoes a phase change

- Water undergoes a phase change
- An example of a physical change is a phase change
- Therefore, water undergoing a phase change is an example of physical change

- Water undergoing a phase change is an example of physical change
- If something undergoes physical change then the chemical properties of that something will remain unchanged
- Hence, the chemical properties of water will remain unchanged

- The chemical properties of water will remain unchanged
- Being a compound or an element is a chemical property of substances
- So, water being a compound or an element will remain unchanged

- Water being a compound or an element will remain unchanged
- Water is a kind of compound
- Therefore, water being a compound will remain unchanged

Therefore, water being a compound will remain unchanged
Question: As the molecules of water begin to slow down they go into a phase where they are no longer able to easily move past each other. The water is passing through a phase change and will
Context: - A phase change is when a substance changes from one state of matter into another state of matter 
- Water is a kind of substance 
- The molecules of a substance cannot move easily past each other in solid state 
- Being a compound or an element is a chemical property of substances 
- An example of a physical change is a phase change 
- If something undergoes physical change then the chemical properties of that something will remain unchanged 
- Water is a kind of compound 
- Water changes into a phase where the molecules cannot move easily past each other 
- Solid is a kind of state of matter