Pre Test

1. Earth has incredibly had a long history. Approximately, how old is the Earth?

• a. 4.5 million

• b. 45 million

• c. 4.5 billion

• d. 45 billion

2. Which organisms first dominated the Earth?

• a. Dinosaurs

• b. Fishes

• c. Plants

• d. Bacteria

3. The largest division on the Geologic Time Scale is called

• a. Eon

• b. Era

• c. Epoch

• d. Period

4. The Mesozoic era is called the Age of Reptiles, how about in Cenozoic era?

• a. Age of Mammals

• b. Age of Birds

• c. Age of Humans

• d. Age of Technology

5. What is the longest part of Earth's history where trace fossils appeared?

• a. Precambrian

• b. Paleozoic

• c. Mesozoic

• d. Cenozoic