Geologic Time
What is the main purpose of the Geologic Time Scale?
Ⓐ To show the daily changes that happen on Earth's surface
Ⓑ To organize Earth's history into major periods of geologic time
Ⓒ To identify the exact location of every fossil found on Earth
Ⓓ To describe the weather conditions that existed during each year
Ⓑ To organize Earth's history into major periods of geologic time
What is an eon?
A. The smallest unit of geologic time
B. The largest unit of geologic time
C. A type of rock
D. A period of one year
B. The largest unit of geologic time
What is an era in the Geologic Time Scale?
A. A division of an eon
B. A type of fossil
C. A period of one year
D. A layer of the atmosphere
A. A division of an eon
What is a period in the Geologic Time Scale?
A. A division of an era
B. A division of an eon
C. The largest unit of geologic time
D. A type of fossil
A. A division of an era
What is an epoch in the Geologic Time Scale?
A. A division of a period
B. A division of an eon
C. The largest unit of geologic time
D. A type of rock
A. A division of a period
Which event happened first in Earth's history?
A. Appearance of humans
B. Age of dinosaurs
C. Formation of Earth
D. Appearance of flowering plants
C. Formation of Earth
Which is the oldest eon in Earth's history?
A. Phanerozoic
B. Proterozoic
C. Archean
D. Hadean
D. Hadean
Which era is known as the “Age of Dinosaurs”?
A. Cenozoic
B. Mesozoic
C. Paleozoic
D. Precambrian
B. Mesozoic
Which period is known for the appearance and rapid diversification of many marine organisms during the Paleozoic Era?
A. Jurassic B. Cambrian C. Cretaceous D. Quaternary
B. Cambrian
Which epoch are we currently living in?
A. Pleistocene B. Holocene C. Miocene D. Eocene
B. Holocene
Which organisms appeared millions of years before humans?
A. Dinosaurs
B. Modern humans
C. Dogs
D. Cats
A. Dinosaurs
During which eon did Earth begin to form?
A. Hadean
B. Archean
C. Proterozoic
D. Phanerozoic
A. Hadean
Which era came first?
A. Cenozoic
B. Mesozoic
C. Paleozoic
D. All came at the same time
C. Paleozoic
During which period did dinosaurs first appear?
A. Triassic B. Jurassic C. Cretaceous D. Devonian
A. Triassic
During which epoch did modern humans first appear?
A. Holocene B. Pleistocene C. Jurassic D. Cretaceous
B. Pleistocene
Which is the correct order from oldest to most recent?
A. Humans → Dinosaurs → First Life → Earth Formation
B. Earth Formation → First Life → Dinosaurs → Humans
C. Dinosaurs → Earth Formation → Humans → First Life
D. First Life → Humans → Earth Formation → Dinosaurs
B. Earth Formation → First Life → Dinosaurs → Humans
Which eon is known for the development of abundant complex life?
A. Hadean
B. Archean
C. Proterozoic
D. Phanerozoic
D. Phanerozoic
During which era did mammals become dominant and diversify greatly? A. Paleozoic
B. Mesozoic
C. Cenozoic
D. Hadean
C. Cenozoic
Which period is known for the extinction of non-avian dinosaurs?
A. Permian B. Triassic C. Jurassic D. Cretaceous
D. Cretaceous
Which epoch came immediately before the Holocene?
A. Miocene B. Eocene C. Pleistocene D. Oligocene
C. Pleistocene
Why is the Geologic Time Scale divided into different units?
A. To identify the different climates of Earth
B. To measure the distance between continents
C. To organize Earth's long history based on major events
D. To determine the age of every living organism
C. To organize Earth's long history based on major events
Which shows the correct order of the four eons from oldest to most recent?
A. Archean → Hadean → Proterozoic → Phanerozoic
B. Hadean → Archean → Proterozoic → Phanerozoic
C. Phanerozoic → Proterozoic → Archean → Hadean
D. Hadean → Proterozoic → Phanerozoic → Archean
A. Archean → Hadean → Proterozoic → Phanerozoic
Which shows the correct order of the three eras of the Phanerozoic Eon, from oldest to most recent?
A. Cenozoic → Mesozoic → Paleozoic
B. Mesozoic → Paleozoic → Cenozoic
C. Paleozoic → Mesozoic → Cenozoic
D. Paleozoic → Cenozoic → Mesozoic
C. Paleozoic → Mesozoic → Cenozoic
Which shows the correct order of these Mesozoic periods, from oldest to most recent?
A. Jurassic → Triassic → Cretaceous
B. Cretaceous → Jurassic → Triassic
C. Triassic → Jurassic → Cretaceous
D. Triassic → Cretaceous → Jurassic
C. Triassic → Jurassic → Cretaceous
Which shows the correct order of these epochs from oldest to most recent?
A. Holocene → Pleistocene → Pliocene → Miocene
B. Miocene → Pliocene → Pleistocene → Holocene
C. Pleistocene → Miocene → Holocene → Pliocene
D. Pliocene → Holocene → Miocene → Pleistocene
B. Miocene → Pliocene → Pleistocene → Holocene