The earth and its atmosphere

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1. why have carbon levels been increasing?

  • not enough trees are being grown to take in the carbon dioxide and release oxygen
  • modern machinery requires carbon to function
  • the burning of fossil fuels is adding carbon dioxide to the atmosphere faster than it can be removed. This means that the level of carbon dioxide in the atmosphere is increasing, contributing to global warming.
  • there are too many people being born causing more carbon dioxide to be released into the atmosphere
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2. what is the Miller-Urey Experiment?

  • 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
  • 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 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 is a fissure in a planet's surface from which geothermally heated water issues.

3. what is continental drift?

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

4. what are meteorites?

  • parts of the moon
  • unidentified rocks on earth
  • a meteorite is a solid piece of debris from a source such as an asteroid or a comet, which originates in outer space and survives its impact with the earth's surface. it is called a meteoroid before its impact, a meteorite's size can range from S-XL
  • a heavy rock that comes from space

5. What are the layers of the earth?

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

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