4th Grade Unit 7 Rocks and Fossils

Front

The remains or traces of an organism that lived long ago is a _____________.

Back

fossil

Front

Petrified trees in the desert are evidence that there was once far more ____________________ in the area.

Back

water

Front

The age of one thing compared to another is called ___________________

Back

relative age

Front

True or False: Environments do not change over time

Back

False

Front

The youngest layer of rock is always on the ______________.

Back

top

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a living organism from the past.

Front

What does 'petrified' mean in the context of fossils?

Back

Petrified means that organic material has turned into stone over time.

Front

What is the process of fossilization?

Back

Fossilization is the process where organic material is replaced by minerals, preserving its shape.

Front

What is an extinct species?

Back

An extinct species is a group of organisms that no longer exists.

Front

What does 'relative age' tell us about rocks?

Back

Relative age tells us the age of a rock layer compared to other layers.