Bill Nye Fossils

Most of the things that have ever lived on Earth are...

• still around today

• now extinct

• under the ocean or underground

• now fossils

If fossils of fish and sea shells are found in an area that is now desert, we might assume that:

• Fish could breathe air at one time in their history
• Sea shells could live on land millions of years ago
• The area in which the fossils were found was once covered with water

Fossil evidence cannot reveal which of the following important information about animals that have lived in the past? 

• Size and Weight
• Diet and Behavior
• Exact Year of Death
• Environment

Fossils are usually found in...

• igneous rock

• sedimentary rock

• metamorphic rock

• any of these types of rocks

An imprint of a living thing found in rock is called a...

• cast fossil

• index fossil

• imprint fossil

• mold fossil

A fossil in the actual shape of an organism is usually a...

• mold fossil

• cast fossil

• index fossil

• imprint fossil

Trees can become petrified when the pores, or holes inside become filled with ____________________.

• water

• minerals

• ash

• mud

Fossils are not the actual living things, but ___________________ in the shape of the living thing

• rock

• bones

• clay

• holes

Most fossils are about 2 million years old

• true

• false

Some fossils were formed when animals were buried in volcanic ash.

• true

• false