Fossils are very special kinds of rocks.
They can teach us about the things that lived long ago.
Fossils can teach us that some dinosaurs ate meat and others ate plants.
Fossils can tell us how insects moved around.
We can learn what life in the ocean was like from fossils.
Some fossils can show us where different kinds of plants lived.
We can build a dinosaur skeleton out of fossils.
Certain fossils can even help us learn about our past.
There are many different kinds of fossils.
Everyone has something to teach us.
A fossil is made of______ .
Why are fossils special?
What have we learned from fossils?
From fossils, we know that some dinosaurs______.
Read this sentence from the passage: Certain fossils can even help us learn about our past. What does "certain" mean?