Cambrian Period

In history we're continuing to study the earliest time period and we're currently learning about the Cambrian Period. One of the important things about the Cambrian period is that it is the first period of time that showed some animals with shells. So, we decided to make a shell fossil today.



First we mixed up the plaster of paris in a paper cup, and then put the shell in it (we covered the shell with vaseline before putting it into the plaster to help with removal).





After the plaster dried for an hour, we removed the shell and there's our fossil. Tomorrow we'll be filling the cast with colored plaster to create another type of fossil. More about that tomorrow.