Biology Tutorials > The Origins of Life > Geological Periods

Geological Periods

Geological Periods

Geologic time scale (GTS), a system of chronological dating used to show events that have occurred in Earth’s history

Precambrian Times (Most Ancient)

All time before life existed, Earth was still a volatile environment, though the origins of life came around during this period.
Origins of Life on Earth
First Life on Earth
Cell Development & Diversification

Cambrian Period

The development of multi-cellular organisms, including sponges, primitive animals, and various plant life, diversifying from old species
Multicellular Organisms
Primitive Animals

Ordovician > Permian Periods

The transition from primitive species to specialized organisms, the increasing of genetic diversity via sex, and the transition from sea to land
Arthropods
Insecta – One of The Arthropods
Fish

Triassic / Jurassic Periods

The arrival and dominance of dinosaurs in the air, land, and sea, and how they developed from their ancestors and the causalities of their existence
Amphibians & Early Reptiles
The Dinosaurs

Cretaceous Period

The removal of dinosaurs from planet Earth and the emergence of mammals and other more complex organisms
Dinosaur Extinction
Mammals Ancestors

Tertiary Period

The evolution of man and further diversification of all species to the present date. The transition of Neanderthal man to modern man.
Early Mammals
The Hominids

Quaternary Period

The evolution of man and further diversification of all species to the present date. The transition of Neanderthal man to modern man, and how our dominance of planet Earth has directly shaped the future timeline of planet Earth.
The Homo Species

 

Credit: PBS Eons

Quiz

Identify the Geological period that these events occurred. Select the best answer from the box. Write it on the space provided. (Note: answers are case-sensitive.)

Precambrian
Cambrian
Cretaceous
Tertiary
Quaternary
1. The further diversification of species to the present date
2. Dinosaurs became extinct
3. The transition of Neanderthal man to modern man
4. Development of multicellular organisms
5. First life on Earth

Send Your Results (Optional)

Your Name
To Email
Biology Tutorials > The Origins of Life > Geological Periods

You will also like...

Peppered moth ("Biston betularia") melanic and light form
Examples of Natural Selection

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

Genetic engineering
Genetic Engineering Advantages & Disadvantages

This tutorial presents the benefits and the possible adverse eventualities of genetic engineering. Know more about this ..

Still Water Community Plants
Still Water Community Plants

This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

squirrel
Animal Water Regulation

Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

Young plant growing from the soil.
Soils

Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

Origins of Life on Earth
Origins of Life on Earth

Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..