Limestone that can be highly polished is (termed) marble. A: improved by B: similar to C: known as D: substituted for

volcano is to lava as () A: geyser is to water B: fault is to tremor C: glacier is to fissure D: avalanche is to snow E: cavern is to limestone

What is the cause of the problems that people living on parts of the south coast of England face? A: The disappearance of hotels, houses and gardens. B: The experts’ lack of knowledge. C: The rising of the sea level. D: The washing-away of limestone cliffs.

1. What is the cause of the problem that people living on parts of the south coast of England face? A: The disappearance of hotels, houses and gardens. B: The experts’ lack of knowledge. C: The rising of the sea level. D: The washing-away of limestone cliffs.

How did “columnar joints” come into being? A: The magma condensed into stone columns. B: The pumice stones piles layer by layer. C: The volcanoes look like columnar joints. D: Creatures were gradually fossilized and they slowly turned into a thick limestone layer on the seabed