http://www.sciencekids.co.nz/projects/fossilcast.html
Find an interesting object and set it in stone, letting its impression live on in the form of a fossil.
Have fun making your
own fossil and learning how scientists use them to unlock secrets of the
past, including those that provide a remarkable insight into life in
the age of dinosaurs
What you'll need:
- Plasticine
- 2 paper cups
- An object that you would like to use as the fossilized impression
- Plaster of paris
- Water
Instructions:
- Flatten a ball of plasticine until it is about 2 cm thick while making sure the top is smooth.
- Put the plasticine inside a paper
cup with the smooth side facing up. Carefully press the object you want
to fossilize into the plasticine until it is partially buried.
- Carefully remove the object from the plasticine. An impression of the object should be left behind.
- Pour half a cup of plaster of
paris into the other paper cup. Add a quarter cup of water to the
plaster and stir until the mixture is smooth. Leave it for around two
minutes.
- When the mixture has thickened
pour it on top of the plasticine in the other cup. Leave the mixture
until the plaster has dried (leave it for 24hrs if you want to be sure).
- When the plaster has fully dried,
tear away the sides of the paper cup and take out the plasticine and
plaster. Keep it in a warm dry place and enjoy your very own fossil.
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What's happening?
Fossils are extremely useful
records of the past. In your case you left behind an impression of an
object you own but fossils found by scientists around the world can
date back to the time of dinosaurs. These fossils allow paleontologists
(the name of scientists who study these types of fossils) to study
what life might have been like millions of years ago. Fossils such as
the one you made can leave delicate patterns and a surprising amount of
detail.
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