Write a paragraph describing how sedimentary rocks are formed.
What conditions are required to form a fossil?
Name four different types of fossils.
In you own words, write a description of how dinosaur fossils are formed.
NOTE: This week’s activities reinforce the fact that fossils and petrified wood can be made over a short period of time.
Make a “fossil” using plaster of paris. Mix the plaster of paris and pour it onto a paper plate. Gather different objects (leaves, toy dinosaurs, etc.), press each into the plaster of paris, and then lift the object off. Include a print of your hand or foot. Let dry. Paint, when dry, if desired.
This is week 3 of the experiment started in Lesson 3. Has your mound decreased any? What caused this decrease?
That the organism be buried rapidly, protected from scavengers and from decomposition by bacteria and chemicals
Hard parts are preserved; replacement by other minerals; cast or mold are all that remains; petrification; cabonization; preservation of soft parts; frozen animals; animal tracks and worm burrows; coprolites; gastroliths
See page 41.
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