Fossils: Clues to the Past (Part 2)

What You'll Learn

Fossils are preserved remains or traces of ancient organisms. They form when organisms are buried in sediment that hardens into rock over millions of years.

Key Words

igneous
metamorphic
sedimentary

Materials Needed

rocks
sand
clay
water

Safety First

Clean up spills immediately to prevent slipping.
Use materials only as directed in the experiment.

Steps

Step 1 — Read

Read and learn: Fossils are preserved remains or traces of ancient organisms. They form when organisms are buried in sediment that hardens into rock over millions of years.

Step 2 — Do

Create a labeled diagram of what you built or observed.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis?

Check Your Understanding

Question 1

1 of 3

Which layer of Earth is the thinnest?