Quiz 1

• Earth is referred to as the goldilocks planet because it is just the right distance from the sun, just the right size, temperature, albedo to ensure it has enough water for life to develop
• Hydrogen bonds affect the boiling point and specific heat capacity because they are so strong it means both of these will be higher. It also effects density
• Chemical weathering takes in CO2 which controls climate and physical is an actual breakdown so it won't effect the carbon dioxide concentrations.
• The main sources of iron in seawater are atmospheric dust and rivers. It is not phytoplankton as they take in iron from seawater (won't release as much when they die).
• When doing equations involving ppm

  1. Convert into mol
  2. then use the mr to convert to mass (g)
  3. then convert into mg because 1 mg/kg = 1ppm
  4. this is the answer (in ppm)
• Although new crust is growing at mid ocean ridges, the ocean is not growing in size. This is because at the same time new crust is being consumed at subduction zones. There is a balance between renewal and consumption is approximately equal