What does petrified mean?
What happens to insects when they become trapped in amber?
Which statement BEST describes how the fossil bones of a dinosaur are formed?
Which of the following is NOT an example of a fossil?
A paleontologist finds a fossil of a fish on top of a mountain. She can infer that the area was once ___________________________.
Long ago, small organisms became trapped in sticky tree sap that hardened. What is the hardened sap called?
The preserved remains of a plant or animal that lived long ago are called ____________.