strata
What is strata?
Layers of rock
If you found a fossil in the top layer of a strata, would it be the youngest fossil in the strata?
Yes
Which layer would be the oldest layer, the middle layer, the top layer, or the bottom layer?
The bottom layer
What was first, the earth formation or the earliest sign of life?
The earth formation
True or false:The dinosaurs lived before humans.
True
What is a fossil?
A fossil is any remains of ancient life
Law of superposition states that...
The Youngest rock layer= Top
The Oldest rock layer= bottom
How old is the earth?
4.6 billion years old
When was the earliest sign of life?
3.9 billion years ago