History of Earth Project

How do we determine the age of the Earth?

Resources- history of Earth notes

Claim- accretion, crust, mantle, core

evidence- Relative dating- determining the age of an object by comparing its age to another object

evidence- Example- rocks in different layers in the crust

evidence- Absolute dating- determining the actual age of an object

evidence- Example- using radioactive decay to determine the actual age of a rock

connection- if i wanted to determine the exact age difference between my sister and i, then i would use a calculator to figure the exact difference just like absolute dating

Why does the surface of the Earth look like it does today?

resources- history of earth notes

claim- continental drift, plate tectonics, plate boundaries, convection

evidence- Continental drift- continents once formed as a single landmass and have broken apart to present day locations

evidence- Convection- heat transfer by the movement of heated fluid

evidence- divergent boundaries- move away from each other

evidence- Convergent boundaries- move towards each other

evidence- Transvergent boundaries- slide past each other up and down

connection- my friends were in a relationship as a whole landmass lol and then they broke up like what continental drift is. Where they split apart and it stays that way

What changes do rocks go through?

resources- history of earth notes

claim- rock cycle, igneous, sedimentary, and metamorphic rocks, compaction, cementation, and fossils

evidence- Igneous, sedimentary, and metamorphic can change into another type of rock

evidence- Compaction- the weight of overlying sediments cause pressure and push the sediments together

evidence- Cementation- minerals get left between sediments and provide a cement to hold the sediments together

evidence- Rock cycle- magma is the parent material for all rock, igneous, sedimentary, and metamorphic rock

connection- when i wake up in the morning, i go through a continuous cycle of changing outfits