Fossils are evidence of life on Earth from long, long ago. Fossils can be bones or teeth or whole insects encased in amber. Fossils can be footprints or impressions of plant of animals parts. Fossils are often found buried in layers of soil and rock. When scientists find layers of rock containing fossils, they know that the oldest fossils are found in the bottom layer and as they work up toward the ground, the layers get younger.

What story do these layers containing fossils tell you? Check all the sentences that are TRUE.

The first five layers show life that lived in the ocean.
There were plants on Earth before animals.
Layer 7 to layer 12 shows the fossils of life living on land.
Life on Earth changed over time.
Life on Earth was extinct in layer 6.