fossils views of the earth’s past. fossils traces or remains of living things they can give us...
TRANSCRIPT
Fossils• Fossils• Traces or remains of living things• They can give us clues into the following
– Climate: weather conditions
– http://www.youtube.com/watch?v=3rkGu0BItKM
– Habitat: where they lived
– Food: what they ate
– Appearance: what they looked like
• http://www.youtube.com/watch?v=c_DCP4cLVNg
Original Remains
• Ice-whole organisms have been found in ice
• Tar-thick oily liquid that preserves whole organisms
• Amber-Tree Sap-traps insects on trees– Think the movie Jurassic Park
Fossil Formation• Molds and Casts
– molds• Shape of organisms remainscasts-shape was filled in with liquid rock and took shapehttp://www.youtube.com/watch?v=SEDfRy6DQns
• Petrified Wood– Stone trees-sediments pour into holes in wood and harden
• Carbon Films– Imprints on rocks of entire animals
• Trace Fossils-leave evidence – Footprints, trails, holes, and even feces left behind
Let’s Make a mold
• Using your play doh! and the shell. We are going to make an example of a cast
• Watch as I demonstrate.
Let’s Make a Cast
• Using your play doh! and the shell. We are going to make an example of a cast
• Watch as I demonstrate.
Let’s Make an Imprint
• Using your play doh! and the shell. We are going to make an example of an imprint
• Watch as I demonstrate.
Let’s Make a model of a trace fossil
• Using your play doh! and the shell. We are going to make an example of a cast
• Watch as I demonstrate.
Ice Cores
• Ice Core-Tubular sample that shows the layers of snow and ice– Vertical timeline– Ice traps air
• Contents of air like dust and ash from volcanoes• Radiation trapped• Thicker layers mean ice ages• Thin layers mean warmer temps