The earth and its atmosphere

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1. what are deep sea vents? (hydrothermal vents)

  • a heated gap in the sea filled with water
  • a hydrothermal vent is a fissure in planet's surface from which geothermally heated water issues. hydrothermal vents are commonly found near volcanically active places, areas where tectonic plates are moving apart, ocean basins and hotspots.
  • a deep gap in the sea floor
  • a place where only some animals can live
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2. what is the Miller-Urey Experiment?

  • the aim was to see if substances now made by living things could be formed in the conditions thought to have existed on the early earth.
  • the Miller-Urey experiment is a fissure in a planet's surface from which geothermally heated water issues.
  • the Miller-Urey experiment tested to see if life began in a pond or ocean as a result of the combination of chemicals from the atmosphere and some form of energy to make amino acids
  • the Miller-Urey experiment suggested that the original molecules of life formed with clay that, as it crystallizes, sticks together, is capable of bringing in more clay and thus start a mechanism for selecting materials

3. what is continental drift?

  • continental drift is a theory that suggests the original molecules of life formed within clay
  • continental drift is a solid piece of debris from a source such as an asteroid or a comet
  • continental drift is when heat release from radio active processes cause convection currents
  • continental drift is a fissure in a planet's surface from which geothermally heated water issues

4. What are the layers of the earth?

  • top, middle, bottom
  • crust, magma, outer core, inner core
  • crust, mantle, outer core, inner core
  • earth, plates, lava, core

5. what causes the motion of the plates?

  • the plates move because of huge forces caused by convection currents
  • the plates move because are slowly breaking up
  • the plates move because the ocean slowly pushes them
  • the plates move because of the rotation of the earth

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