Flashcards
Quiz 1 Flashcards
Flashcards do conjunto (24)
- 1DinosaurA non-avian creature that may be able to swim, is any size, and is not extinct
- 2BirdAn avian dinosaur
- 3AmberFossilized tree resin
- 4SpinosaurusHad flat feet to paddle, retractable nostrils, broad tail (rudder), dense bones (buoyancy) and hunted in rivers. Proof that dinos could swim
- 5ArchaeoteryxHas features of both a bird and a dinosaur and is a transitional fossil
- 6MicroraptorA transitional fossil that has four wings and is proof that dinos may have evolved into birds because this species could have flown
- 7PangeaA past supercontinent
- 8LaurasiaNorthern Pangea
- 9GondwanaSouthern Pangea
- 10Plate BoundariesCan be convergent, divergent, or transform boundaries
- 11Convergent BoundariesCreate subduction zones which form volcanoes and mountains
- 12Divergent BoundariesCreate spreading centres which form mid ocean ridges and sub-sea volcanoes
- 13Transform BoundariesOnly go in one direction and relieve built up stress (slide laterally)
- 14ConvectionWater heats and rises, then cools and sinks. Forces plates to move and allows heat to release from land surface
- 15Tectonic TheoryThe plates move relative to one another because the earth is slowly cooling due to convection
- 16Layers of the EarthThe lithosphere is the crust which is dragged, pushed and pulled
The mantle is a solid that flows through convection
The outer core is a liquid that affects magnetic field
The inner core is solid and composed of mainly metals - 17Alfred WegenerLooked at the map of the continents and put them together like a puzzle to see pangea (viewed as the edge of the continental crust boundaries)
- 18Principle of UniformitarianismThe present is similar to the past in the sense that the natural processes are mainly the same. This means the Earth is old
- 19Sea Level during DinosThe sea level was around 125m higher during the time of the dinosaurs due to a change in the size of mid-ocean ridges, all ice sheets being melted, and thermal expansion. Isostasy minimally combats this rise.
- 20Changing Ocean Basin SizeIn general, a small ocean basin means an increased sea level, and a large ocean basin means a decreased sea level. You can change the size of an ocean basin by changing the size of mid-ocean ridges, having continents separate and collide, or filling the basin with sediment
- 21Changing Size of Mid-Ocean RidgesOne way to change the size of an ocean basin. Fast spreading means a wide ridge and an increase in sea level, whereas slow spreading means a shallow ridge and a decrease in sea level
- 22Collision and Separation of ContinentsOne way to change the size of an ocean basin. When continents collide, they pile up, take less space, and decrease sea level, whereas when continents separate, they decrease the size of the basin and increase sea level
- 23Thermal ExpansionThe idea that warm water occupies more space than cold water. During dinos, it was warm, so this increased sea level
- 24IsostasySea level sags or rebounds with more or less water, respectively