Understanding Fossils and Permineralization

What is typically considered the minimum age for a bone to be classified as a fossil?

• 50,000 years

• 10,000 years

• 5,000 years

• 1,000 years

Which of the following is NOT a condition where fossils can be preserved?

• Desert sand

• Volcanic ash

• Freshwater lakes

• Ice

What is the process called when hard structures become infused with minerals?

• Crystallization

• Permineralization

• Sedimentation

• Fossilization

How do minerals crystallize in the cavities of rocks or fossils?

• By slow crystallization

• Through compression

• Through evaporation

• By rapid cooling

What happens to the microscopic cells in petrified wood during permineralization?

• They expand

• They are filled with minerals

• They become hollow

• They dissolve