Science Flashcards
What is the geological timescale?
A system that organizes Earth’s history into different time periods.
True or False: The geological timescale includes eons, eras, periods, and epochs.
True
Fill in the blank: The largest division of geological time is called an ______.
eon
What eon do we currently live in?
The Phanerozoic eon
Which era is known for the age of dinosaurs?
The Mesozoic era
What period came after the Paleozoic era?
The Mesozoic period
Multiple Choice: Which is the correct order of the geological timescale from largest to smallest?
Eon, Era, Period, Epoch
What is the name of the current geological epoch?
The Holocene epoch
True or False: The Precambrian is the longest part of Earth’s history.
True
Fill in the blank: The _______ period is known for the first appearance of mammals.
Triassic
What major event marks the end of the Mesozoic era?
The mass extinction of dinosaurs
Multiple Choice: Which era is known for the development of complex life?
The Paleozoic era
What event marks the beginning of the Cenozoic era?
The extinction of the dinosaurs
Fill in the blank: The _______ epoch is characterized by the rise of humans.
Anthropocene
True or False: The Cambrian period is known as the ‘Age of Fishes.’
False
What is the significance of the Cambrian explosion?
It marks a rapid diversification of life forms.
Multiple Choice: Which period is known for the first land plants?
The Ordovician period
What are the two main classifications of geological time?
Relative time and absolute time
Fill in the blank: The _______ period is known for the first dinosaurs appearing.
Triassic
What does the term ‘mass extinction’ refer to?
A rapid and widespread decrease in the biodiversity on Earth.
True or False: The Pleistocene epoch is known for its ice ages.
True
What is an index fossil?
A fossil used to define and identify a particular time period.
Multiple Choice: Which of the following is NOT a division of the geological timescale?
Season
Fill in the blank: The _______ era is known for the appearance of flowering plants.
Cenozoic
What is the main difference between an eon and an era?
An eon is a larger time division than an era.
True or False: The Holocene epoch started about 11,700 years ago.
True
