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Adapted from SuperScience Red, February, 1990.
Whoops! Arnold accidentally carries a fossil with him back in time, where it turns back into what it was originally - a dinosaur egg. Here, your kids can make two types of "fossils." |
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Sometimes, animal remains trapped in stone dissolve away. That leaves an imprint fossil - a hollow imprint of the remains in the stone. Footprints can also leave imprint fossils.
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Objects for making prints: twigs, shells, pine cones, chicken bones (boiled clean)
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A paper bag
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A small handful of modeling clay (at art and toy stores) per child
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1 plastic baggie per child
Place the objects in a paper bag.
Give each student a lump of clay and a plastic bag.
Let each student choose an object from the paper bag, without showing it to the others.
Have them put their clay in the plastic bag and flatten it.
Students press objects into clay through the bag.
Students remove clay from the bag. Ask: How is your imprint like your object? Different?
