Use your copy of the New York Geologic Time Scale. Which of the following is the oldest?

• Mastadont (O)

• Elliptocephala (A)

• Tetragraptus (J)

• Cooksonia (P)

Use your copy of the New York Geologic Time Scale. When did the earliest fishes appear?

• late cretaceous
• middle cambrian
• late silurian
• early permian

Use your copy of the New York Geologic Time Scale. According to the available fossil evidence, which set of events is listed in the correct order from earliest (oldest) to most recent? Use the 'Life' Section on your large Geologic Time Scale for help.

• Extinction of trilobites, extinction of armored fishes (placoderms), extinction of dinosaurs
• Appearance of first corals, appearance of earliest insects, appearance of earliest reptiles
• Decline of brachiopods, appearance of earliest amphibians, appearance of earliest grasses

Use your copy of the New York Geologic Time Scale. During which time period did Pangaea begin to break up?

• late triassic
• middle ordovician
• early permian
• late pennsylvanian

Use your copy of the New York Geologic Time Scale. How many millions of years ago (mya) did the dinosaurs (and many other organisms) go extinct?

• 251 mya
• 23 mya
• 225 mya
• 65.5 mya

Use your copy of the New York Geologic Time Scale. Which of the sequences of index fossils pictured show the CORRECT order in which these organisms existed on Earth (from oldest to youngest)

• 1
• 2
• 3
• 4

Use your copy of the New York Geologic Time Scale. What we know now, were trilobites and dinosaurs alive at the same time?

• Yes
• No

Use your copy of the New York Geologic Time Scale. Which type of organism has been alive for the longest period of time?

• vascular plants
• mammals
• crinoids
• gastropods

Use your copy of the New York Geologic Time Scale. During which era did amphibians first appear?

• paleozoic
• mesozoic
• cenozoic

Use your copy of the New York Geologic Time Scale. Which of the following statements is best supported by the evidence seen in the Earth's rock layers and fossil record?

• Humans have existed through Earth's entire Geologic History.
• The organisms that exist on Earth have NOT changed over time.
• 99% of the life forms that have existed on Earth throughout time have gone extinct.
• Dinosaurs existed on Earth for over 500 million years.