Life Science, Thursday Class Opener, 2.21.19

Produced when sediments fill in a cavity made when an object decayed 

• cast
• mold
• original remains

Cavity in a rock made when an organism decayed

• cast
• mold 
• original remains

Process that uses the properties of atoms in rocks and other objects to determine their ages 

• relative dating
• radioactive decay 
• absolute dating

Fossil of thin layer of carbon atoms and molecules 

• original remains 
• carbon film
• trace fossil

Remains, imprints or traces of once-living organisms

• water
• superposition
• fossils 

Fossils of species that existed for  short periods and were widespread 

• trace fossils 
• index fossils 
• original remains 

People who study fossils are called ____.

• meterologists
• fossilologists
• paleontologists
• fossil hunters

Which of the following is NOT an example of a fossil?

• a petrified dinosaur bone
• a footprint captured in mud
• a seashell found on the beach
• an insect stuck in amber

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

• sedimentary  rock
• metamorphic rock
• igneous rock

In order for a fossil to form, which of the following events must happen FIRST?

• Slowly, minerals in the water replace the bone.
• Sediment covers the bone.
• An animal dies.
• The bone is no longer a bone, but a rock copy.