Moon Phases and Eclipses
What moon phase has the left half of the moon's disk in the sunlight?
Last Quarter
What is the Solar Nebula Hypothesis?
Giant cloud of gas and dust collapsed, gravity pulled in material to the center- sun formed, leftover material formed a rotating disk.
Who's hypothesis was originally rejected?
Wegener's hypothesis
What is the law for Relative Dating?
Law of Superposition
What are relative and absolute dating?
Relative- determines chronological order of events without a specific date
Absolute- provides a specific numerical age in years through decay rate of radioactive isotopes.
Which eclipse has the moon between the sun and Earth?
Solar Eclipse
What are the steps for planetesimals? (In order)
What lithospheres are affected by Plate Tectonics?
Oceanis and continental lithosphere are affected
What is another name for Absolute Dating?
Radiometric Dating
What are the four main geological Time scale names?
Eons, Eras, Periods, Epochs
What Eclipse causes the Earth to see a annular eclipse while another part of Earth sees a total eclipse?
A Hybrid Eclipse
What are the stages of Proto Earth's Growth?
Planetesimals merged into larger bodies, intense collisions released heat, Proto Earth grew into a planet.
Why do plates in the Earth move?
Convection currents in the mantle
What element is used to date organic materials up to 50,000 years old?
Carbon 14
What time scale has the largest divisions of geological Time?
Eons
What moon phases cause high/spring tides; what moon phases cause low/neap tides?
Full moon and New moon; first and third quarter phases
What is Late Heavy Bombardment?
Intense asteroid and comet impacts possibly delivered water and organic molecules.
What are the three plate boundaries?
Divergent Boundary, Convergent Boundary, Transform Boundary
What is Uranium 238 used for?
reliable for dating old rocks; helping date back 4.5 billion years or greater.
What are the three eras that the Phanerozoic era divides into?
Paleozoic, Mesozoic, Cenozoic
What causes spring and neap tides?
caused by different alignments of the Sun, Moon, and Earth
What are the stages of Earth's Formation?
Solar Nebula collapse- Planetesimals- Proto Earth growth- Differentiation- Heavy Bombardment
What is the Ring of Fire?
Horseshoe-shaped belt around the Pacific ocean, home to hundreds of active volcanoes.
What does higher Pb 206 and Uranium 238 indicate?
A young rock
What are the three Jurassic Epochs?
Early Jurassic, Middle Jurassic, Late Jurassic