It's very fun to race through the snowy mountains on a snowmobile.

This plant has withered due to lack of water.

He was observing the distant birds using binoculars.

This area is rich in peridotite.

This mountain is made of tuff.

This rock is gabbro.

He is majoring in petrology at university.

The students lined up in response to the teacher's instructions.

He cleaned the bowl of the pipe thoroughly.

This cigarette contains carcinogens.