sicence

________ are evidence of past life.

the breaking down of rocks into smaller pieces is

called ------------.

The geologic time scale represents Earth's ________ year history.

Scientists use ______ dating to figure out the exact age of something.

A ________ is a scientist that studies the composition of the Earth, including rock layers.

. When sediment is moved around by wind or water it is called ________.

Scientists use ______ to help figure out geologic time.

Dinosaurs lived in the ___________ era.

Rock made from sediment compacted by the weight of sediment layers above are called __________ rock.