7R - Review Fossils

Most fossils form when living things die and are buried by _______________ that hardens into rock over time.

• sediment

• people

• cement

• ants

A ______________________ is a scientist who studies fossils.

• biologist

• chemist

• paleontologist

• astronomer

Scientist study the ____________________ to learn about the history of life, past environments on Earth, and how different groups of organisms have changed over time.

• fossil record

• animal record

• historical record

• Earth record

Principle that Earth's processes occurring today are similar to those that occurred in the past 

• unconformities 
• uniformitariansim 
• superposition 

Principle that states in a sequence of undisturbed rocks, the oldest rocks are on the bottom and the rocks become progressively younger toward the top 

• superposition 
• uniformitarianism
• half-life

Remains, imprints or traces of once-living organisms

• water
• superposition
• fossils 

In which kind of rock do we usually find a fossil?

• sedimentary  rock
• metamorphic rock
• igneous rock

Which animal part would most likely form a fossil?

• Muscle 
• Fur
• Lung
• Bone 

True or False....Only dinosaurs have been fossilized.

• True
• False

An organism that no longer exists on Earth is called

• Decayed
• Evolved
• Extinct
• Preserved