3rd Grade Ch. 2 Lesson 4 How are animals from the past like today's animals
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Ch. 2 Lesson 4 How are animals from the past like today’s animals?
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Transcript of 3rd Grade Ch. 2 Lesson 4 How are animals from the past like today's animals
Ch. 2 Lesson 4How are
animals from the past like
today’s animals?
fossils• signs of past life• made from hard
parts of animals• tell how Earth has
changed over time
1. fossil mold• space in the shape of an
animal in rock
2. cast• shape of
original fossil• fossil mold that has
been filled with rock materials over time
3. amber• hardened
tree sap that traps animals
4. fossils in tar pits1. Animals fell into tar pits2. Soft parts of animals broke down3. Left actual bones behind
Saber-toothed tiger
Unlike the fossil remains of mostdinosaur bones, the bones of
this fossil saber-toothed tiger areactual bone.
extinct• no longer living
Badlands in South DakotaBefore
hot, wet climate
After
desert
Reptiles resemble dinosaurs
What is hardened tree sap that trapped animals?
tarambercastfossil mold
The Badlands in South Dakota have always been a desert.
TRUE
FALSE
fossil moldcastambertar pit
What kind of fossil is this?
