This mountain is made of igneous rock.

Smoking is considered a cause of carcinogenesis.

This area is rich in pitchstone.

In this chemical reaction, the gaseous phase plays an important role.

This compound is stable in the solid phase.

In this experiment, we will measure the temperature at which the substance becomes a liquid phase.

He is working tirelessly.

This stratum shows a specific facies.

In preparation for the exam, my friend encouraged me by saying 'hang in there'.

He was diagnosed with lung cancer.