Geologic Time Scale

Complete the sentence.

"The geologic time scale is a record of _______________"

• the history of fossils only

• the history of rocks

• the history of rock layers and fossils

• geologist notes

What are remains of prehistoric life used to determine divisions in geologic time?

• Living organisms

• rock strata or layers

• DNA

• fossils

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

Which era is the longest?

• Cenozoic
• Cambrian
• Precambrian
• Phanerozoic

What type of bacteria that have existed during the Precambrian Era?

• Thermophiles

• Cryophiles

• Basophiles

• Extremophiles

What is the Supercontinent during Precambrian Period?

• Gondwana

• Pangaea

• Rhodena

• None of the above

What is the event of the Water Cycle that led to the cooling down of the Hadean Earth?

• Evaporation

• Condensation

• Transpiration

• Precipitation

What made Precambrian organisms to become extinct?

• Eventually, oxygen became abundant in the atmosphere.

• Carbon dioxide made most of the organisms suffocated.

• It happened due to large amount of methane accumulation.

• Nitrous oxide became poisonous.

During what Period were Dinosaurs present?

• Paleogene

• Quaternary

• Precambrian

• Jurassic

Age of reptiles (dinosaurs) Scientists believe that it ended due to a meteorite hitting the Earth, causing a thick layer of dust/dirt cloud (causing an ice age) due to the sun not being able to reach Earth's surface

• Cenozoic Era

• Paleozoic Era

• Precambrian Time

• Mesozoic Era