The Age of Earth

What era is known for the explosion of life forms?

• Paleozoic

• Precambrian Time

• Mesozoic

• Cenozoic

True or false: Earth's early atmosphere was made primarily of carbon dioxide (CO₂).

• TRUE

• FALSE

"Intrusions are younger than the rock they cut across" is stated in which principle?

• The Principle (Law) of Superposition

• The Principle of Cross-cutting Relationships

• The Principle of Uniformitarianism

• Murphy's Law

"Younger rocks are found above older rocks" is stated in which principle?

• The Principle (Law) of Superposition

• The Principle of Cross-cutting Relationships

• The Principle of Uniformitarianism

• Murphy's Law

What is the theory that explains the creation of Earth's moon?

• Pangaea

• Fission Theory

• Nebular Nursery

• Giant Impact Hypothesis

Which of these is an ABSOLUTE dating method?

• Radiocarbon dating

• Law of Superposition

• Index of Fossils

Which of the following is the extinction event that wiped out the dinosaurs?

• Cambrian Explosion

• Permian-Triassic Extinction

• Cretaceous Extinction

• Ordovician Extinction

Which of the following is a consequence of mass extinctions on the planet?

• More habitat for species

• Loss of biodiversity

• Decreased species competition

• Increased species richness

Which of the following is NOT a cause of Ice Ages?

• Collisions with celestial objects

• Variations in earth's axis and orbit

• sunspot and solar activity

• changes in ocean currents

The LONGEST part of Earth's history, including earth's formation and development of early atmospheres and oceans, is called _____________.

• the Cenozoic Era

• the Quarternary Period

• Precambrian Time

• the Mesozoic Era