Module 12 Review Question
The second EON, which corresponds to the time when single-celled life developed (between 4.0 billion years and 2.5 billion years ago), is called ...
.. Archean Eon
The earliest EON, which represents the time between the formation of our planet (4.6 billion years ago) and the age of the oldest rock discovered so far (about 4.0 billion years ago), is called ...
... Hadean Eon
The figure above is a representation of the rock layers in the Grand Canyon National Park. The younger sedimentary layers vary in age from 525 million years old (the Tapeats Sandstone) to 270 million years old (the Kaibab Limestone). All these sedimentary rocks were formed during an Eon called ...
... Phanerozoic Eon
The figure above is a representation of the rock layers in the Grand Canyon National Park. The oldest layers are at the bottom and the youngest layers are at the top. The oldest exposed rocks in the Grand canyon are found in the inner gorge of the Colorado River. These rocks have volcanic origins, and were formed 1.7 billion years ago, during an Eon called ...
... Proterozoic Eon
The geologic ERA known as the age of mammals is ...
... the Cenozoic Era
The geologic ERA known as the age of dinosaurs is ...
... the Mesozoic Era
Most of our planet's crustal rocks (both oceanic and continental crust) formed during which of the following EONS?
Archean Eon
Which of the following options are widely accepted as the main causes for the historical five mass extinction events?
Large meteorite impacts Significant and rapid changes in the climate Massive volcanic eruptions
Which of the following options are widely accepted as the main causes for the historical five mass extinction events?
Massive volcanic eruptions Large meteorite impacts Significant and rapid changes in the climate
The figure above is a representation of the rock layers in the Grand Canyon National Park. The younger sedimentary layers vary in age from 525 million years old (the Tapeats Sandstone) to 270 million years old (the Kaibab Limestone). All these sedimentary rocks were formed during an Eon called ...
Phanerozoic Eon
Abundant body fossils of eukaryotic organisms (the foundation of complex life) can be found only in rocks younger than about 1.2 Ga. These rocks formed during which of the following EONS?
Proterozoic Eon
Between 2.4 Ga and 1.8 Ga, huge amounts of iron settled out of the ocean to form colorful sedimentary beds known as banded iron formation. These rock formations developed during which of the following EONS?
Proterozoic Eon
During which of the following EONS did Earth's atmosphere changed from oxygen-poor to oxygen-rich?
Proterozoic Eon
During which of the following EONS did most of Earth's cratons (the cool, rigid, and old central portion of continents) formed?
Proterozoic Eon
The Ediacaran fauna, named for a region in southern Australia where fossils of these organisms were first found, marks the beginning of visible life (macroscopic organisms), including soft-bodied multi-cellular animals, like sponges, jellyfish, worms, and relatives of the arthropods. These organisms developed during which of the following EONS?
Proterozoic Eon
The supercontinent Pannotia (figure above) formed during which of the following EONS?
Proterozoic Eon
The supercontinent Rodinia (figure above) formed during which of the following EONS?
Proterozoic Eon
The third EON, which corresponds to the time when multi-celled, soft-bodied organisms first emerged (between 2.5 billion years and 540 million years ago), is called ...
Proterozoic Eon
The Precambrian time, which covers about 88% of our planet's history, includes which of the following Eons?
Proterozoic Eon Archean Eon Hadean Eon
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Bright Angel Shale, a sedimentary layer formed at about 515 Ma, during which of the following geologic periods?
The Cambrian Period
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Tapeats Sandstone, a sedimentary layer formed at about 525 Ma, during which of the following geologic periods?
The Cambrian Period
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Redwall Limestone, a sedimentary layer formed at about 340 Ma, during which of the following geologic periods?
The Carboniferous Period
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Supai Group, a sedimentary layer composed of many rock units formed between 315-285 Ma, during which of the following geologic periods?
The Carboniferous Period The Permian Period
The Alpine-Himalayan chain (figure above) formed during the last 65 million years, when the former Gondwana continents (Africa, South America, Australia, India) collided with the southern margins of Europe and Asia. The formation of this orogenic belt happened during which of the following geologic ERAS?
The Cenozoic Era
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Temple Butte Limestone, a sedimentary layer formed at about 385 Ma, during which of the following geologic periods?
The Devonian Period
The figure above is a representation of the rock layers in Zion National Park (Utah), highlighting the Carmel Formation, a sedimentary layer formed between 190-140 Ma, during which of the following geologic periods?
The Jurassic Period
The break up of the supercontinent Pangea began at about 200 million year ago, during which of the following geologic ERAS?
The Mesozoic Era
The extinction of dinosaurs marks the end of which of the following geologic ERAS?
The Mesozoic Era
The first true dinosaurs evolved at the end of the Triassic period (about 200 million year ago), during which of the following geologic ERAS?
The Mesozoic Era
Land plants first appeared during which of the following geologic ERAS?
The Paleozoic Era
The evolution of amphibians to reptiles occurred during which of the following geologic ERAS?
The Paleozoic Era
The evolution of fish to amphibians occurred during which of the following geologic ERAS?
The Paleozoic Era
The evolution of marine invertebrates to fish occurred during which of the following geologic ERAS?
The Paleozoic Era
The figure above is a representation of the rock layers in the Grand Canyon National Park. The younger sedimentary layers vary in age from about 525 million years old (the Tapeats Sandstone) to about 270 million years old (the Kaibab Limestone). All these sedimentary layers were formed during which of the following Eras?
The Paleozoic Era
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Coconino Sandstone, a sedimentary layer formed at about 275 Ma, during which of the following geologic periods?
The Permian Period
The figure above is a representation of the rock layers in the Grand Canyon National Park, highlighting the Hermit Shale, a sedimentary layer formed at about 280 Ma, during which of the following geologic periods?
The Permian Period
The figure above is a representation of the rock layers in Zion National Park (Utah), highlighting the Moenkopi Formation, a sedimentary layer formed at about 240 Ma, during which of the following geologic periods?
The Triassic Period
The figure above is a representation of the rock layers in Zion National Park (Utah), highlighting the Wingate Sandstone, a sedimentary layer formed at about 200 Ma, during which of the following geologic periods?
The Triassic Period
The mass extinction event that happened about 65 million years ago - in which about 76% of species went extinct - marks the boundary between which of the following slices of geologic time? (mark all that applies)
The boundary between the Cretaceous and the Tertiary Periods The boundary between the Mesozoic and the Cenozoic Eras
The significant mass extinction event when the dinosaurs, which had ruled the planet for over 150 million years, simply vanished, along with 90% of plankton species in the ocean and up to 75% of plant species, marks the boundary between which of the following slices of geologic time? (
The boundary between the Cretaceous and the Tertiary Periods The boundary between the Mesozoic and the Cenozoic Eras
The mass extinction event that happened about 443 million years ago - in which about 80% of species went extinct - marks the boundary between which of the following slices of geologic time?
The boundary between the Ordovician and the Silurian Periods
The mass extinction event that happened about 251 million years ago - in which about 96% of species went extinct - marks the boundary between which of the following slices of geologic time?
The boundary between the Paleozoic and the Mesozoic Eras The boundary between the Permian and the Triassic Periods
The mass extinction event that happened about 251 million years ago - in which about 96% of species went extinct - marks the boundary between which of the following slices of geologic time? (mark all that applies)
The boundary between the Paleozoic and the Mesozoic Eras The boundary between the Permian and the Triassic Periods
The appearance of invertebrates with shells defines the boundary between which of the following slices of geologic time?
The boundary between the Proterozoic and the Phanerozoic
