Fossil?

Today the scientists of Lab 204 looked at some rock samples. Each rock was different, and we noticed many details and had many questions we were wondering about.

One rock had what looked like a mark on it. Some people thought that mark was a leaf fossil, or a leaf print, or even a tire track left by a car or bicycle.

We had a science discussion about this rock. We agreed that it was probably from a plant, and that the plant looked a lot like some evergreen leaves we had looked at earlier in the week. We had some lingering questions, though:
- How could someone find this rock if it was made before people were on the Earth?
- Was it made by sand piling on top of other sand, with a leaf stuck in between?
- Is this a print of a leaf, or something else, like a leaf fossil?

In the science unit we are starting, we will be exploring rocks, water, and how the Earth changes over time. We will get to the idea of fossils and other evidence that scientists have about the ancient Earth, but not for a while!