Practice - Fossil Record

What is a conclusion that can be made about this fossil record?

• Crinoids lived in every rock layer.

• The gastropods are the oldest fossils because they are in almost every layer.

• Trilobites lived on Earth the longest amount of time.

• Ammonites lived about the same time

Which is most likely the youngest organism (newest)?

• fern

• fern and the coral
• coral

• none - they are all about the same age

Which is TRUE about this fossil record?

• Birds are older than mammals.

• The animals in this diagram are the same age.

• Reptiles started in the Jurassic period.

• Fish came before birds.

What is TRUE about this geologic timescale?

• Organisms that lived 66 million years ago were mostly aquatic animals

• Organisms that lived 400-500 million years ago were aquatic (water) species.
• Dinosaurs lived about 1 million years long

• ocean animals lived a shorter time than mammals

What can a geologic timescale tell us?

• some of the existence, diversity, and extinction throughout the history of life on Earth
• why a species went extinct and where it happened

• which types of fossils were found

• mya (multiple years ago)

What type of fossil? (its a negative impression)

• carbon film

• trace

• true form

• mold

What kind of fossil is this? It's a real mammoth skeleton found in ice.

• true form
• carbon film
• cast
• petrified wood

Which type of fossil is described here?

• carbon film
• petrified wood

• true form
• cast

What can be inferred about the age of fossils found in the same rock layer?

• They are from different periods.

• One is older than the other.

• They are different ages.

• They are the same age.

Which type of fossil provides evidence of the activities or behaviors of ancient organisms?

• carbon film

• trace

• true form

• mold