Podcast
Questions and Answers
The ______ Eon, also known as the Pre-Cambrian, occurred 5 million years ago.
The ______ Eon, also known as the Pre-Cambrian, occurred 5 million years ago.
Precambrian
The ______ era, which is part of the Phanerozoic Eon, is known as the "Age of Fishes."
The ______ era, which is part of the Phanerozoic Eon, is known as the "Age of Fishes."
Devonian
The ______ period of the Mesozoic era saw the extinction of dinosaurs due to an asteroid impact.
The ______ period of the Mesozoic era saw the extinction of dinosaurs due to an asteroid impact.
Cretaceous
The ______ period, part of the Cenozoic Era, is also known as the "Age of Mammals."
The ______ period, part of the Cenozoic Era, is also known as the "Age of Mammals."
______ is the change in characteristics over time.
______ is the change in characteristics over time.
Flashcards
Precambrian Eon
Precambrian Eon
The earliest eon in Earth's history, including Hadean, Archean, and Proterozoic.
Paleozoic Era
Paleozoic Era
An era marked by ancient life, ended with a major mass extinction.
Mesozoic Era
Mesozoic Era
Known as the age of reptiles, featuring dinosaurs and the Pangaea supercontinent.
Cenozoic Era
Cenozoic Era
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Theory of Evolution
Theory of Evolution
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Study Notes
Eons and Eras
- Hadean, Archaean, and Proterozoic (eons) are also known as the Pre-Cambrian era and Proterozoic period—occurring 5 billion years ago (mya).
- Only algae, fungi, and sponges existed.
- Phanerozoic eon has 3 eras
Paleozoic Era
- Ancient life; characterized by the largest mass extinction at the end of the era.
- Age of Invertebrates (Cambrian, Ordovician, Silurian periods)
- Age of Fishes (Devonian period)
- Age of Amphibians (Carboniferous and Permian periods)
- Cambrian: Trilobites (like fleas) and brachiopods (like clams)
- Ordovician: Coral and 2nd largest mass extinction
- Silurian: First insects and invertebrates
- Carboniferous and Permian: Amphibians, non-vascular plants, trilobites extinction
Mesozoic Era
- Middle life; Pangaea; Age of Reptiles
- Triassic: Small dinosaurs, mammals
- Jurassic: Large dinosaurs, flower plants
- Cretaceous: Dinosaur extinction due to asteroid
Cenozoic Era
- Recent life
- Age of Mammals (Paleo-Eo-Oligo-Mio-Plio Epoch): Herbs, grasses, and mammals—began 65 mya
- Age of Humans (Quaternary period, Ice Age, Pleistocene-Holocene): Began 3.5 mya
- Mountain formation
Module 16
- Evolution: Change in characteristics over time
- Theory of Evolution: Developed by Charles Darwin
- Evidence for evolution (4 points indicated)
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