SQ2

XX are layered. Some form when particles of rocks and minerals settle out of water or air.

A XX is a person who studies fossils.

She XX up on a loose paving stone.

We need to XX what happened immediately after the accident.

A XX is the bones in the head of a person or an animal.

To XX is to find or learn something for the first time.

To xx is to look carefully at something or someone.

We’ll look for volcanic XX below and above this rock layer.

To XX means to dig in the ground to look for old objects.

His XX XX was to explore the hills.