What type of rock is this?

Sedimentary rock ___ form when erosion moves sediment to low lying areas such as valleys and lake bottoms.

Over time, shells and sediment pile up at the bottom of lakes and oceans. These pieces can form rocks, such as

Over very long periods, bodies of water can dry up. As the water evaporates, dissolved substances in the water become solids. This can form sedimentary rock layers, such as ___

After thousands to millions of years, sediment and parts from shelled animals that lived in the past may be compressed and cemented into rocks like this ___

What's going on with this starfish?

How did this starfish become a fossil?

This fossil likely lived in what kind of environment?

___ ___ is any method of determining whether something is older or younger than something else.

Magma intruded into these sedimentary rocks, cooled, and formed a diagonal band of igneous rock. The intrusion is ___

  than the sedimentary rocks it cuts through.

An ___ ___ is the remains of an organism that was common and widespread, but only existed for about 1 million years or less.

This type of trilobite is an index fossil that lived about 440 million years ago. Fossils of the trilobite and the brittle star were found in the same rock layer. What can you infer about these two organisms?

How old is the crystal in this photo?

I am younger than my cousin.

This is the last book in the series.

Check

___ ___ is any method of measuring the actual age of something in years.

Mr. De La Rosa is