Scientists classify rocks by using three main ways.
1- Mineral Composition, Is the study of whats inside the rock you are classifying.
2- Texture, The study of how they feel the rock, so if the rock is smooth and flat then you would say that the texture is smooth, flat, and glassy.
3- How they form/origin, Is the study where the rock was formed at, so if it has crystallization then it took long to cool, so it was somewhere where it was hot.
1- Mineral Composition, Is the study of whats inside the rock you are classifying.
2- Texture, The study of how they feel the rock, so if the rock is smooth and flat then you would say that the texture is smooth, flat, and glassy.
3- How they form/origin, Is the study where the rock was formed at, so if it has crystallization then it took long to cool, so it was somewhere where it was hot.