18 Questions
What percentage of the Earth's surface is covered by oceans?
71%
What is the main component of the Earth's atmosphere?
Nitrogen
What is the process by which one rock type changes to another?
Rock cycle
What is the main driving force behind the evolution of species?
Natural selection
What is the term for the region of the Earth where all life exists?
Biosphere
What percentage of the Earth's water is freshwater?
3%
What is the main focus of the science of Geology?
Understanding the formation, structure, and behavior of rocks, minerals, soils, and subsurface water
What is one of the ways Geology is related to our everyday life?
Guiding the use of natural resources
What is the name of the field of study that examines the materials composing Earth and seeks to understand the processes that operate beneath and upon its surface?
Physical Geology
What is the term used to describe the Earth due to its unique feature of supporting life?
The Lonely Planet
What is the component of the Earth system that refers to the solid Earth or rock?
Geosphere
What disciplines does Geology incorporate principles from?
Physics, chemistry, biology, and engineering
What is the primary source of power that drives internal processes on Earth?
Heat generated continuously by radioactive decay
What is the average elevation of continents above mean sea level?
2,750 feet
What is the characteristic that distinguishes continental crust from oceanic crust?
Chemical composition
What is the average thickness of oceanic crust?
7 km
What is the term used to describe rocks high in magnesium and iron?
Mafic
What is the center of the Earth composed of?
Iron-nickel alloy
Learn about the science of geology, including the study of rocks, minerals, soils, and subsurface water. Discover how geology is related to everyday life, from sourcing water and natural resources to mitigating natural hazards.
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