RNA
~ single-stranded nucleic acid that contains the sugar ribose
DNA
~ A complex molecule containing the genetic information that makes up the
chromosomes.
Stromatolites
~ Oldest known fossils formed from many layers of bacteria and sediment.
Anthroprocene
~ New era of geological history,...
✓✓✓✓~ Geological zone that includes Oceans, glacial ice and freshwater
Catastrophism
✓✓✓✓~ One big sudden change - only true for meteor impacts. Shaping Earth's landscape
by catastrophes.
Uniformitarianism
✓✓✓✓~ Charles Lyell's idea that geologic processes have not changed throughout Earth's
history.
Divergent Boundary
✓✓✓✓~ A plate boundary where two plates move away from each other.
Geomagnetic Reversals
,✓✓✓✓~ a change in a planet's magnetic field such that the positions of magnetic north and
magnetic south are interchanged, while geographic north and geographic south
remain the same.
Pangea
✓✓✓✓~ A supercontinent containing all of Earth's land that existed about 225 million years
ago.
Atmosphere
✓✓✓✓~ A mixture of gases that surrounds the Earth.
Bioshpere
✓✓✓✓~ all the parts of the planet that are inhabited by living things; sum of all Earth's
ecosystems
Geosphere
✓✓✓✓~ the solid part of the earth consisting of the crust and outer mantle
Continental Drift
✓✓✓✓~ The hypothesis that states that the continents once formed a single landmass,
broke up, and drifted to their present locations - Proposed by Alfred Wagner
,Core
✓✓✓✓~ The central part of the earth below the mantle made of two parts - a liquid outer
shell, and a solid centre
Precambrian
✓✓✓✓~ Name for the time in earths early history that accounts for over 80% of earth's time,
but only cellular organisms lived.
Mesozoic Era
✓✓✓✓~ Age of reptiles
Paleozoic Era
✓✓✓✓~ the part of geologic time 570-245 million years ago ; invertebrates, fishes,
amphibians, reptiles, ferns, and cone-bearing trees were dominant
Lithosphere
✓✓✓✓~ A rigid layer made up of the uppermost part of the mantle and the crust.
Asthenosphere
✓✓✓✓~ The soft layer of the mantle on which the lithosphere floats.
, Mesosphere
✓✓✓✓~ The strong, lower part of the mantle between the asthenosphere and the outer core
Convergent Boundary
✓✓✓✓~ A plate boundary where two plates move toward each other.
mid-ocean ridge
✓✓✓✓~ An underwater moutain chain where new ocean floor is formed
subduction zone
✓✓✓✓~ The region where oceanic plates sink down into the asthenosphere.
Minerals
✓✓✓✓~ Molecules that occur naturally, are inorganic, solid, and have a definite and ordered
atomic structure.
Polymorph
✓✓✓✓~ One mineral that can take multiple forms (Ex: Carbon is graphite and diamond)
crystal habit
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