Question

which of the following would be a clue that a rock is sedimentary? choose one option a it has gas bubbles throughout. b it has small particles stuck together. c it is very hard. d all of the above.

Explanation:

Sedimentary rocks are formed from the accumulation and cementation of small particles (sediments) like sand, silt, and clay. Gas bubbles throughout a rock are a characteristic of igneous rocks (formed from cooled magma/lava where gas can escape and leave bubbles). While some sedimentary rocks can be hard, this is not a unique or defining clue compared to the particle - based formation clue. So, the presence of small particles stuck together is a key clue for sedimentary rocks.

Answer:

B. It has small particles stuck together.