Cretaceous Period
The Cretaceous Period is a geological period that lasted from approximately 145 to 66 million years ago. It is the third and final period of the Mesozoic Era, following the Jurassic Period and preceding the Paleogene Period of the Cenozoic Era.
Key Events and Characteristics:
- Climate: The Cretaceous Period had a relatively warm climate, and the Earth was mostly ice-free.
- Flora and Fauna: This period saw the diversification of angiosperms (flowering plants) and the emergence of new groups of organisms, including modern types of insects, mammals, birds, and flowering plants.
- Extinction Event: The Cretaceous-Paleogene extinction event occurred at the end of the Cretaceous Period, leading to the extinction of the non-avian dinosaurs, as well as many other plant and animal species.
- Geological Formations: The Cretaceous Period saw the deposition of chalk, limestone, and other sedimentary rocks, leading to the formation of well-known geological features such as the White Cliffs of Dover in England.
Study Guide:
To study the Cretaceous Period, it's important to understand the following key concepts:
- What are the major geological events and characteristics of the Cretaceous Period?
- How did the climate and environment of the Cretaceous Period contribute to the evolution of new plant and animal species?
- What were the major groups of organisms that emerged during the Cretaceous Period, and how did they contribute to the diversity of life on Earth?
- What were the causes and effects of the Cretaceous-Paleogene extinction event?
- How did the geological formations of the Cretaceous Period contribute to the shaping of the Earth's surface?
By understanding these concepts, you will gain a comprehensive understanding of the Cretaceous Period and its significance in the Earth's history.
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Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.