7E6.2 Geologic Time Scale

What is the main challenge in understanding the history of life on Earth?

• The changing climate

• The complexity of life forms

• The lack of written records

• The vast stretches of time involved

Who published the first laws of stratigraphy?

• Charles Darwin

• Nicholas Steno

• Giovanni Arduino

• William Smith

What was Giovanni Arduino's contribution to geology?

• He named the layers of rock

• He discovered fossils

• He developed the theory of evolution

• He measured the age of the Earth

What is the significance of fossils in geologic studies?

• All of the above

• They show the evolution of life

• They provide evidence of past climates

• They help in dating rock layers

Which eon is known for the formation of the Earth?

• Phanerozoic

• Proterozoic

• Archaean

• Hadean

What major event marks the beginning of the Paleozoic era?

• The extinction of dinosaurs

• The formation of the first continents

• The Cambrian explosion

• The appearance of the first mammals

Which era is often called the 'Age of Reptiles'?

• Paleozoic

• Mesozoic

• Cenozoic

• Proterozoic

What event likely caused the end of the Mesozoic era?

• A massive volcanic eruption

• A global ice age

• The rise of mammals

• A giant asteroid impact

Which era marks the rise of mammals?

• Cenozoic

• Proterozoic

• Mesozoic

• Paleozoic

What is a significant impact of humans on Earth's history?

• The appearance of cyanobacteria

• The extinction of dinosaurs

• The shaping of habitats and biosphere

• The formation of the first continents