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Topic 5/6 review

QuestionAnswer
Why is it important for geologists to use relative and absolute age when looking at rocks? Geologists may not be able to figure out the absolute age of every rock
What is the purpose of the geologic time scale? To organize events throughout earth's history and create a timeline
What are two key elements of Precambrian time? It covers 88% of earths history and was a time of very few fossils
Potassium-40 and carbon-14 are used to find the __________ Absolute age of rocks
Explain the theory of Pangea When all of the continents on earth were together as one mass of land
What are the two defining aspects of the Mesozoic Era? The dominance of dinosaurs and Pangea breaking apart
What are the three Eras seen on the geologic time scale? Mesozoic, Cenozoic, and Paleozoic
The three units of time on the geologic time scale are called? Eras
Why might residents of a new apartment complex have insects and rodents in their building? The animals have not relocated after their habitat was taken away
The time it takes for a radioactive material to decay by half is called? Half=life
Define Ozone Three oxygen atoms in one molecule
Why does a hole in the ozone layer cause sunburn and skin cancer Less ozone= more UV Radiation
Filling in a wetland for human development would cause? Increased pollution, increased erosion, and increased flooding
How long does it take for recycled material to become new items? 60 Days
What is sustainable use of a resource? Using a resource with consideration for future generations
Is the supply of freshwater evenly distributed around the world? No the supply of freshwater is not evenly distributed around the world
Created by: Alago74
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