Geologic Time Scale

How old is Earth?

• 46 million years

• 4.6 billion years

• 4.6 million years

• 460 thousand years

Which is the longest time period in the geologic time scale?

• Era

• Epoch

• Eon

• Period

What was Pangaea?

• an era

• a dinosaur

• a sea

• a supercontinent

When did humans appear?

• Paleozoic

• Mesozoic

• Cenozoic

• Precambrian

For which do we use trees' growth-rings?

• Plate tectonics

• Dendrochronology

• Stratigraphy

• Radiometric dating

Which came first?

• Amphibians leave the water.

• The age of reptiles.

• Trilobites are one of the dominant species on Earth.

• Early humans arise on Earth.

Dinosaurs were dominant during which era?

• Mesozoic

• Precambrian

• Paleozoic

• Cenozoic

Which part of the country has many fossils?

• Northern

• Southern

• Central

• Western

How many dinosaur species have been discovered at the Iharkút mine?

• 4

• 6

• 11

• 1

Which epoch are we living in?

(a)