- As temperature during the day increases , the temperature in an environment will increase
- As the temperature of an environment increase, the objects in the environment will increase in temperature
- Hence, as the temperautre of the day increases, the objects in the environment will increase in temperature

- As the temperautre of the day increases, the objects in the environment will increase in temperature
- As the temperature of an object increases , the size of that object will increase
- Hence, as the temperature of the day increases, the size of the objects in the environment will increase

- As the temperature of the day increases, the size of the objects in the environment will increase
- The metal railroad tracks are out during the day
- Temperature increases during the day
- Therefore, the size of the metal railroad tracks will increase during the day

- The size of the metal railroad tracks will increase during the day
- Length is a part of size
- Therefore, the length of the metal railroad tracks will also increase during the day

Therefore, the length of the metal railroad tracks will also increase during the day
Question: What happens to metal railroad tracks during the heat of a summer day?
Context: - The metal railroad tracks are out during the day 
- Length is a part of size 
- Temperature increases during the day 
- As temperature during the day increases , the temperature in an environment will increase 
- As the temperature of an object increases , the size of that object will increase 
- As the temperature of an environment increase, the objects in the environment will increase in temperature