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Science Crossword

Teacher: Charlie
Across
Scientists who study fossils
An extreme thin coating of carbon rock
An organism that no longer exists
Lava that hardens on the surface and forms igneous rock
Horizontal layers of sedimentary rock with oldest at the bottom and youngest at the top
A solid copy of the shape of an organism
A break in Earth's crust
The number of years that have passed since the rock has formed
Fossils that provide the activities of ancient organisms
Down
A rock's age compared to the rocks around it
Fossils in which minerals replace all of an organism
A hollow area in sediment in the shape of an organism
A fossil that help scientists match rock layers
The preserved remains of traces of living things
A gap in the geologic record
The changing in living things over time
Magma cools and hardens into a mass of igneous rock