Sedimentary Rocks: Fossils in Sedimentary Rock

The video explores the fascinating world of petrified tree trunks at the Petrified Forest National Park in Arizona. It explains how these trees became fossils through petrification, a process where minerals replace organic material. The video also discusses various types of fossils, including trace, imprint, and cast fossils, and their formation in sedimentary rocks. It highlights the significance of fossils as evidence of past life and the conditions that lead to their preservation.

What is the main attraction at the Petrified Forest National Park in Arizona?

• Living trees

• Petrified tree trunks

• Imprint fossils

• Dinosaur bones

How do minerals contribute to the formation of petrified fossils?

• They create a mold around the organism

• They dissolve the original material

• They replace the cells of the organism

• They prevent the organism from decaying

Which type of rock is most commonly associated with fossil formation?

• Igneous rock

• Metamorphic rock

• Volcanic rock

• Sedimentary rock

What is a trace fossil?

• A fossil that is formed by mineral replacement

• A fossil that is an exact replica of the organism

• A fossil that shows evidence of an organism's activity

• A fossil that forms a mold

How is a cast fossil different from a mold fossil?

• A cast fossil is hollow, while a mold fossil is solid

• A cast fossil is filled with minerals, while a mold fossil is not

• A cast fossil is formed by decay, while a mold fossil is not

• A cast fossil is an imprint, while a mold fossil is a trace