Science Olympiad Dynamic Planet Practice Test

What is the geological significance of the term 'snowball earth theory'?

1. It implies that continental plates are immobile.

2. It suggests a period of extreme glaciation on Earth.

3. It indicates the formation of supercontinents.

4. It explains the theory of tectonic plate movement.

The correct answer is: It suggests a period of extreme glaciation on Earth.

The geological significance of the 'snowball earth theory' primarily revolves around the concept of extreme glaciation periods in Earth's history. This theory posits that during certain intervals, particularly in the Precambrian era, the Earth experienced global ice cover, which extended from the poles to the equator. Such conditions would have had profound impacts on the planet's climate, ecosystems, and the evolution of life. The implications of this theory are broad, including how these extensive ice ages affected atmospheric composition and biological diversity. The theory supports the understanding of climate dynamics over geological timescales and the interplay between climate and biological evolution. It also emphasizes the potential for large-scale climatic shifts leading to significant changes in Earth's surface environments. Overall, recognizing the significance of the snowball earth theory helps illustrate how Earth has undergone dramatic climatic changes that have shaped its geological history.