Page 26 - York Global Science 4 - Earth & Space

Did You Know?
Did You Know?

The oldest fossils ever found are
cyanobacteria. These fossils are 3.5

billion years old! The picture shows
what they look like.

Let’s Understand
Let’s Understand

Scientists can find out how old a

fossil is by using index fossils.
Your teacher will give you a tray of

sand.
You will find a fossil in the tray.

There are also index fossils in the
tray. These are red, blue or green.

You need to look for your fossil
very carefully. Try not to move the
index fossils. Use the tools to help
you.

When you find your fossil, look at the index fossils near to it.

Use the table to help you find out how old your fossil is.

Index Fossil Colour Age
A Red 50 million years

B Blue 80 million years

C Green 120 million years

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